Benji Madden is "madly in love" with Cameron Diaz.
The Good Charlotte rocker only stated dating the Hollywood actress a few weeks ago after being introduced to her via his twin brother Joel Madden's wife Nicole Richie, but the guitarist is already completely smitten with her.
An insider told the New York Post newspaper's Page Six column: "Benji is madly in love with Cameron, but she wants to take it slow -- he isn't her usual type. He has dated a lot of Nicole's friends in the past but Nicole really wants this one to work."
The new couple have been spotted hanging out at Cameron's house in Los Angeles as well as indulging in a mutual passion - working out at an Equinox gym.
Benji has enjoyed a string of romances with famous blondes over the years, including Nicole's former best friend Paris Hilton, Hugh Hefner's ex-girlfriend Holly Madison and Australian model Sophie Monk.
Meanwhile, the 'Girls & Boys' hitmaker is also set to have a busy year professionally since he has formed a new band with his sibling called The Madden Brothers.
The duo recently announced that their first album, 'Greetings From California', is being released on October 3 and they are already preparing for a tour and live shows.

Michelle Rodriguez has reportedly broken up with Cara Delevingne for good.
The 35-year-old actress is said to have ended her relationship with the Burberry model - who she began dating earlier this year - because of her constant partying with young female celebrities such as her fellow model Suki Waterhouse and 'What Now' hitmaker Rihanna.
A source told The Sun newspaper: "It looks like Michelle and Cara are now over for good.
"Michelle got tired of Cara constantly being pictured with other female celebs."
The 'Lost' actress - who failed to attend Cara's sister Poppy Delevingne's wedding earlier this month - is reportedly ready to settle down while her ex-girlfriend is still enjoying the celebrity lifestyle.
The source added: "Michelle isn't as interested in being in the limelight. She thinks they have different priorities."
Cara, 21, is believed to have attended her sister's wedding party in Morocco on her own last weekend while Michelle was enjoying a holiday in Monaco, France with friends including Chloe Green.
Since Cara began dating the 'Fast and Furious' star she's been pictured on numerous occasions with attractive female friends including Suki, Rita Ora and Jourdan Dunn.

Bruce Willis' wife has shared the first pictures of their new baby daughter.
The 'Die Hard' star and spouse Emma Heming-Willis welcomed their second daughter, Evelyn, into the world three weeks ago and are delighted she has already begun to bond with her older sister, two-year-old Mabel.
Emma posted a picture on Instagram of Mabel cradling her sister's head while the baby gazes up at the older girl and added the caption:
"The start of a beautiful friendship."
The 35-year-old brunette also shared a photograph on her Facebook page at the weekend of herself breastfeeding the new addition to their family.
Emma recently revealed her 59-year-old husband - who also has daughters Rumer, 25, Scout, 22, and Tallulah, 19, with ex-wife Demi Moore - is a "hands-on" father and she will always be grateful for his support.
Speaking shortly before Evelyn's birth, she said: "Luckily, Bruce decided to take some time off to help with Mabel during my pregnancy. He's a very hands-on dad - and secretly I think he'd like to be a stay-at-home dad.
"He's all hands on - and thankfully so. I really couldn't do it without him. That's why I have such respect for single parents. My mom was a single parent, she worked three jobs to support us. I look back and think, 'How could she juggle it all and not lose her mind?'
"I'm so grateful to have such a dedicated dad for our child ... He's a family man. He loves being a dad."

Liam Hemsworth has injured his ankle.
Production on 'The Hunger Games: Mockingjay - Part 2' was halted over the weekend after the 24-year-old hunk - who reprises his role of Gale Hawthorne in the final installment of the franchise - hurt his foot last Friday (23.05.14).
According to E! News, filming stopped on Saturday (24.05.14) and resumed just yesterday (27.05.14) on the big budget movie, which is due for release next year.
Liam was spotted limping in Berlin, Germany, over the weekend and had a second doctor's check-up yesterday.
The star was accompanied by a driver and two members of his entourage as he visited the doctor's office and is thought to have been there for 90 minutes.
Liam and his co-stars Jennifer Lawrence, 23, and Josh Hutcherson, 21, have picked up numerous war wounds while filming the high-octane 'Hunger Games' movies over the last four years.
Josh previously revealed that he suffered a concussion after being kicked in the head by his Oscar-winning co-star, Jennifer.
He said: "The only time I got hurt was when I got kicked in the side of the head by Jennifer. We were hanging out and she was like, 'I can kick over your head', and I was like, 'No way.' She said, 'Watch!' But then she kicked me right in the temple.
"She felt so bad. She was crying. I've had a couple of concussions before so I knew what it feels like when it happens. We had to have a neurologist come in. It ended up being a very mild concussion, but still, it was a concussion."

Johnny Depp is in talks to star as Houdini in a new movie. The 50-year-old actor could be set to take on the role of the famous magician, Harry Houdini, in Lionsgate and Summit's film 'The Secret Life of Houdini: The Making of America's First Superhe...

Sir Mick Jagger is pleased Metallica are headlining this year's Glastonbury Festival.
The Rolling Stones frontman, who has resumed the band's '14 On Fire Tour' after the death of his girlfriend, fashion designer L'Wren Scott, thinks the controversial decision to book Metallica as the first heavy metal band to play Glastonbury will pay off.
Sir Mick told The Sun newspaper: "I've seen them live and they're going to be great."
The singer, who headlined the festival at Worthy Farm in 2013 with band mates Keith Richards, Ronnie Wood and Charlie Watts, also claimed he had a "great time" at the event and their success has seen the group sign up for more festivals this summer.
Metallica will close the line-up on Saturday, June 28, with headline acts Kasabian and Arcade Fire also on the bill.
Drummer Lars Ulrich said: "To be honest with you, we didn't sit around and have a big conversation when the call came.
"In Metallica we have a saying called a 'no-brainer'. Headlining Glastonbury is a no-brainer. We didn't need to sit around thinking about the pros and cons."
The group are the first metal band to ever headline the festival in its 44-year history and admit fans have had mixed reactions to the announcement.
Meanwhile, Sir Mick and his band mates performed their first gig on Monday night (26.05.14) since L'Wren's suicide two months ago.
They took to the stage at Oslo's Telenor Arena in Norway and played to a sold-out crowd of more than 23,000 people.

Simon Cowell has been "amazingly complimentary" of Amanda Holden's looks.
The 43-year-old star - who serves on the 'Britain's Got Talent' judging panel with Simon - has received more than a few comments about her glowing appearance on the show this year and finds it extremely flattering as her colleague sees her "right up close".
She explained: "He's been amazingly complimentary to me this year.
"I know there have been comments on the sly from Simon, too, about how I look, so of course that's the biggest compliment of all to me because I'm sitting next to someone who sees me right up close. I can't get away with anything!"
Amanda admits she has often changed her hairstyle or make-up depending on Simon's reaction, although he would never be as forward as to tell her he didn't like her appearance.
She added: "He's never rude, but does this thing where he'll just kind of stare and his eyes will widen.
"I remember one time I came on with this particularly Eighties-style hair and he just kind of honed in on it with this look on his face. I thought, 'Quick, hairbrush!' "
Meanwhile, Amanda insists she isn't in competition with fellow judge Alesha Dixon, 35, and is tired of people trying to stoke female rivalry between them.
She told Britain's HELLO! magazine: "One of the biggest annoyances I've had was when Alesha joined the show and I got hundreds of questions saying, 'How do you feel about working with someone eight years younger than you?' I thought, 'I don't give a toss.'
"Perhaps if it had been someone similar to me, then possibly it might have become a sticky situation, but Alesha and I couldn't be more different, physically and in our style."

Michelle Keegan picked her own song for her 'Coronation Street' funeral.
The brunette beauty's character Tina McIntyre will meet a grisly end when she plunges off a balcony to her death after a scuffle with a mystery killer, and the actress admits it was strange helping to plan her alter-ego's funeral.
She said: "I'll still watch the show. I've been bought up on 'Corrie'. My family are still massive fans of it. It's going to be weird watching my own funeral. I've picked my own funeral song as well."
Michelle found herself washing off fake blood in the shower after filming the gory final scenes.
She explained: "I've had lots of blood in my hair. You have a shower and it's like your own death scene, because there's that much red. It's really weird. Very glamorous, I tell you!"
Michelle, who has been on the ITV soap for six-and-a-half years, plans on taking Tina's gold earrings with her when she leaves the soap to remember her time there.
She added to Britain's OK! magazine: "I'm taking her earrings. They used to be gold and now they're brown - they've gone through the times with me. And I will probably take a beer mat from the Rovers."

Katie Price has kicked her cheating husband Kieran Hayler out of her mansion.
The pregnant beauty, who was left devastated after discovering the builder and former stripper has cheated on her with her best friend Jane Pountney, 49, had him picked up from her house by his mum after he begged but failed to win her back.
A family friend told The Sun newspaper: "Kieran has been well and truly shown who is boss in this marriage.
"He suffered not only the humiliation of being booted out of the marital home with his tail between his legs, but also the demeaning process of his mother having to pick him up.
"He has nothing without Katie. She made him beg for forgiveness in the most public way - proving his guilt - then threw it back in his face and kicked him out."
Kieran, 27, admitted sleeping with married Jane more than 25 times, including secret sex sessions in Katie's stables, and is now paying for therapy to treat his "compulsive addiction."
His mother drove him back to their family home with an overnight bag on Monday (26.05.14) after Katie, 36, decided she'd had enough of his lies.
The source added: "Kieran is a mess and will do anything to save the marriage. But Katie won't be made to look the fool.
"His brain was in his pants and it has cost him dearly."
The brunette beauty, who is pregnant with Kieran's second child, had been letting him stay in the spare room of her home in West Sussex so he could continue to see their nine-month-old son Jett.
She also has children Harvey, 12, Junior, eight, and Princess, six, from past relationships.
Kieran wrote a letter to Jane dismissing their seven-month affair as just a "dirty, sleazy sh*g" and claimed he was desperate to convince his wife he wanted to save their marriage.
Jane's husband Derrick, 51, is now said to be filing for divorce.

Harry Styles has been spending his spare time knitting while on tour.
The One Direction hunk, 20, who is currently travelling around the world with band mates Zayn Malik, Louis Tomlinson, Liam Payne and Niall Horan, has found using knitting needles and creating clothing is the best way to unwind when he has a spare hour in his hectic schedule.
A source told The Daily Star newspaper: "Harry has always been able to knit, he finds it relaxing.
"But he's never put as many hours in as he is doing at the moment.
"He says it's the only way he can unwind after hours of listening to fans screaming for 1D.
"The other lads tease him for it, but he doesn't care. Harry joked he'll be knitting them all Christmas presents."
Meanwhile, while Harry has been lost in his new hobby, Louis, 22, and Zayn, 21, have appeared in a leaked video sharing a "joint".
The pop stars are seen joking about marijuana while reportedly smoking a suspicious looking self-rolled cigarette in the back of their tour van while being driven to Peru's Estadio Nacional in Lima on April 27.
In the video, obtained by MailOnline.com, Louis says: "So, here we are, leaving Peru. Joint lit. Happy days!"
The pair continue to swear and joke about the police catching them as an officer rides past on a motorcycle.
Louis adds: "One nil b***h! Look at this b***h! He's having a look. He's thinking, 'I'm sure I can smell an illegal substance in there'. And he's hit the nail on the head."
One Direction are yet to comment on the video but sources say it could have been stolen from one of the band member's mobile phones and lawyers have been informed.

Martin Kemp wished Tom Hardy luck for playing both Kray Twins in 'Legend'.
The 52-year-old actor starred as Reggie Kray in 1990's drama 'The Krays' and insists he had enough difficult job portraying just one of the brothers.
Kemp admits Hardy who is in talks to play the both Reggie and Ronnie Kray - who were known as perpetrators of organised crime in the East End of London during the 1950s and 1960s - may be taking on an ambitious role.
When asked if he had any advice for Hardy for playing the London gangster brothers, Kemp told BANG Showbiz: "He's gonna play both parts, interesting. I had enough trouble playing one part. Tom's a great actor. That's his decision so I wish him luck. I don't have any advice - it is just another role but playing both characters hmm ... they weren't identical twins, they were slightly different. I just wish him luck - it is just another role."
Meanwhile, Kemp who recently directed British crime drama 'Top Dog', wanted to create a piece which was different to other things he'd worked on.
He added: "What I wanted to try and do was to make a performance film. So it was all about the acting. It was about what happens behind closed doors - what are the knock on effects of the fightings that had gone off between the boys. Looking at the fights and the guys from the woman's eye, from the woman's perspective and in that way it became a performance film.
"I have seen lots of films where it's just fights and the performance sometimes lack. And I didn't want to make that -I wanted to make a rounded film."
'Top Dog' is out now on Blu-ray and DVD through Universal Pictures.

Jamie Lynn Spears is "proud" of her sister Britney Spears' achievements but is ready to show what a great artist she can be.
The 23-year-old star has released her debut EP, 'The Journey', this week and although she is happy to be associated with her older pop star sister she feels ready to "prove" herself as a country musician.
Speaking about Britney, 32, to Billboard, Jamie Lynn said: "I'm proud of my sister. She's worked hard to become extremely successful. It makes me proud, but it also gives me an outlet to prove who I am as a person and what I love ... For the past few years, I've been writing, working with different people, demoing songs, and really trying to figure out what the exact sound I wanted to put out there. My fans have been so supportive, and have been so patient for me to get the music to them ... I just want to connect with them, and them to get a grasp of who I am as an artist."
The budding singer insists her love of country songs is deep rooted in her childhood when she was growing up in Louisiana.
Jamie Lynn - who has a five-year-old daughter Maddie, from her relationship with Casey Aldridge - says she inherited her appreciation of the genre from her dad James.
The 'How Could I Want More' singer - who is married to Jamie Watson - said: "My first musical memories would have to be with my daddy at the dirt bike track. He loved Merle Haggard and all the greats. I love Loretta Lynn and Conway Twitty - especially the duets they had together. I am a big Patsy Cline fan, but I also love Garth Brooks and Alan Jackson. What you grow up on will always have a special place in your heart."