Nicole Scherzinger has accepted Lewis Hamilton's proposal.
The couple are said to be engaged after reports the Pussycat Doll had snubbed his three previous offers of marriage following their reconciliation late last year.
A source told the Daily Star Sunday newspaper: "Lewis is doing his best to keep the news under wraps but he is absolutely delighted. He got down on one knee and Nicole finally accepted.
"The plan is they are going to live together in Switzerland and travel together when Lewis is racing."
It is said the decision for her to "support him" while he focuses on her Formula 1 efforts will mean Nicole takes a step back in her own career for a while.
The insider added: "Of course, this means her career will have to take a back seat for a while but she is ready to support him on the track.
"Lewis will be the main breadwinner when Nicole is not working and she will always have access to his private jet if she needs to travel.
"It is the ideal plan for both of them and will hopefully lead to a big summer wedding in August when Lewis has a three-week break from his F1 schedule."

George Michael reveals he quit smoking cannabis "over a year-and-a-half" ago.
The 'Faith' hitmaker explained he has "completely stopped" taking the drug, and been clean for over 18 months.
Asked if he still smokes marijuana, he told The Big Issue magazine: "Not at all. I've completely stopped. I haven't touched it for well over a year-and-a-half now."
The star also revealed how his stay in Pentonville prison in 2010 - following a car crash while high on cannabis and anti-anxiety pill Amitriptyline - was "easier" than he expected because he knew it was "deserved".
He explained: "Jail wasn't great. I just thought, get your head down and get on with it.
"It turned out to be easier than I was expecting because I knew I deserved to be there ... I was pretty overwhelmed by the love and support [the fans] showed me."
He also opened up about his battle with pneumonia a few years ago, during which he spent weeks in an intensive care unit.
He said: "On a sub-conscious level it was very frightening and I'll probably never feel quite as safe again.
"But I was just so grateful to come out alive and get back to my home in London."

Theo James had a month's stunt training for 'Divergent'.
The 29-year-old actor plays Tobias 'Four' Eaton in the forthcoming sci-fi film and wanted to ensure his character as the leader of the Dauntless - a rebellious group who pride themselves on their bravery - had a "powerful physical presence" on screen.
He explained: "We had about a month of training, which was great. I wanted my character 'Four', to have a powerful presence physically so you felt you didn't want to mess with him!"
Although 'Divergent' has been tipped to be similar to 'The Hunger Games', which stars Jennifer Lawrence and Josh Hutcherson, James insists it's about "identity".
He added in an interview with We Love Pop magazine: "It's actually quite different. There is of course crossover, the strong female lead and a future where the world has gone through some kind of catastrophe war, but generally that's where the comparison ends. It's more about identity."
'Divergent', which is based on the novel of the same name by Veronica Roth, stars Shailene Woodley as Beatrice "Tris" Prior as the female lead and will be released later this month.

John Legend was given career advice by Prince and Michael Jackson.
The 'All Of Me' hitmaker met the music legends separately but revealed both stars gave him the same advice about taking control of his career.
John exclusively told BANG Showbiz: "[Prince] is a genius. I've met him a few times. We know a lot of the same people in the business and he was signed to Columbia for a time.
"I met him at some of his gigs earlier on in my career, in 2004 or 2005, and I've been to a few of his famous after-parties, after The Grammys.
"He's one of the best performers in the world. I'm star-struck when I talk to him. I just try not to act too nervous around him."
The 35-year-old singer had dinner with late 'Bad' hitmaker Michael at a Formula One event in Bahrain in 2006 and talking about "music and travelling."
John said: "Both he and Prince have had their issues with record labels and they gave me advice about publishing rights and how much to give up.
"It's hard to make those changes when you're in the midst of a contract. As you renegotiate you have to renegotiate based on any power you think you have. It's about who has leverage and taking as much control as you feel you can, while also getting as much cash as you think you should get."

Joey Essex is "too busy" with his new show to think about dating girls.
The 'Educating Joey Essex' star claims he doesn't have time in his busy schedule to talk to girls and despite his admission that he is "back in contact" with his ex-girlfriend and former 'The Only Way Is Essex' co-star, Sam Faiers, he insists he's still single.
He exclusively told BANG Showbiz: "I mean, I'm single but I have just been concentrating on the show, really. I'm too busy [for girls] at the moment. Every single day I'm getting up at early hours of the morning doing different things."
Despite his busy schedule, Joey has been working on rekindling his romance with Sam, following their split last June, and admits they became close again after she was diagnosed with Crohn's disease earlier this month.
He explained: "We've got back in contact with each other, but we're just friends at the moment. So we are talking. I will always be there for her, no matter what happens. It's not nice to hear that someone's ill, is it? She's got a special place in my heart."
Meanwhile, the reality TV hunk praised Sam's sister, Billie Faiers, on her pregnancy and thinks the Minnie's Boutique co-owner and her fiancé, Greg Shepherd, will make great parents.
Joey gushed: "I've congratulated her, yeah ... it's amazing. She will make an amazing mother, she's really nice, so congratulations to her."
'Educating Joey Essex' begins on ITV2 tonight (16.03.14) at 9pm.

Emilia Clarke has been banned from eating "anything that tastes good".
The 26-year-old actress is currently undergoing a gruelling regime of preparation ahead of appearing as Sarah Connor in 'Terminator: Genesis', and her strict diet includes a ban on wheat, sugar, caffeine or dairy.
She said: "I have not been allowed to eat anything that might taste at all good. But don't think I'm complaining because, believe me, I know exactly how lucky I am."
Eyeing a high tea spread of sandwiches, scones, cookies, sweets, cream and teas, she added: "Everything on these plates look amazing but, heartbreakingly, I'm not allowed to eat any of it. Not one thing on this table. Except a cup of tea. One cup of tea. No sugar. No cream."
As well as her diet, the 'Game of Thrones'' star has been "kicking a lot of ass" in fight training for her new role.
She told Britain's InStyle magazine: "I've been spending all day, every day in weapons training. I've been shooting guns, weightlifting, kick boxing and generally kicking a lot of ass."

Perrie Edwards has asked Zayn Malik to help her work out.
The Little Mix star - who got engaged to the One Direction star in August last year - wants her hunky fiance to "motivate" her to get fit since she's too "lazy" to do it herself.
Perrie said: "I've asked Zayn to [help me work out] because I'm really lazy and I need motivating but we never have time."
The pint-sized blonde insists she doesn't wear make-up to the gym because she thinks it will give her bad skin, and band mates Leigh-Anne Pinnock and Jesy Nelson agree.
Asked about whether she wears make-up to the gym, Leigh-Anne said: "Oh, no way!"
Perrie explained: "When you wear make-up in the gym you're sweaty and then you get really bad skin. You're better off just taking it off - letting yourself sweat and then putting it on nicely rather than getting it on your pores."
Jesy added: "When we do dance rehearsals I have to have make-up on. I like to get into character, like Beyonce and Sasha Fierce, and I can't do it if I don't have make-up on or I'll feel rank. But if it's just the gym, then definitely not."
Perrie also admitted she often tricks herself into thinking household chores, including walking to the fridge, count as exercise, while bandmate Jade Thirlwall insists housework can be strenuous.
Perrie told We Love Pop magazine: "I'll walk up the stairs instead of getting the escalator or I'll walk to the fridge and be like, 'Yeah, that was good for me'. "
Jade said: "When I have a day off and I do all the housework I'm exhausted by the end of it. It is very strenuous."

Suki Waterhouse looks like a "tramp" when she's lounging around at home.
The 22-year-old model - who is dating Bradley Cooper - doesn't make an effort to look good when she's hanging out at home and claims she needs help to look "presentable".
She explained: "Well, there's my presentable self and my normal self. I'm the laziest person - that's my normal self. When I'm hanging around my house, I literally look like a tramp. I love being comfortable and having no make-up on. As soon as I get into my house I put on sweats and pyjamas. I love fashion and that's where my presentable self comes in. But I need help - if I didn't have a stylist and make-up artist, I'd look like s**t."
Suki goes through phases where she switches her look and admits she recently she donned 90s art teacher look with bright colours and patterns, but currently prefers "biker chic".
She told LOOK magazine: "It changes constantly with what I buy and new things I have. I went through a phase about a month ago of dressing like a 90s art teacher, kind of Drew Barrymore.
"I got loads of leather trousers form Burberry so I'm quite into biker chic with flats. I've got Jimmy Choo flats and a thick Mulberry sheepskin jacket. I also just got some wicked new Christopher Kane stuff. I'm quite into crop tops at the moment too."

Evan Ross wants to elope with Ashlee Simpson.
The upcoming 'Hunger Games: Mockingjay' star wants to tie the knot sooner rather than later and says the couple are so "in love" that they would consider getting married during a romantic getaway together.
Evan told E! News: "Honestly, we could go and get married right now, wherever. We just want to be married. We're in love.
"This is the most incredible time I could ever think of in my life and I'm young, but the same time, I've lived a different life than most and I can't think of a happier moment."
The 25-year-old actor proposed to Ashlee in January after only six months of dating, however he admits that he was so taken by the singer he would have popped the question even earlier.
He added: "I would have asked her a month after I was with her
whose mother is the legendary singer.
Evan - whose mother is the legendary singer, Diana Ross - claims his mother will be going on tour at the time of their wedding, but she has played a crucial role in helping to plan their nuptials.
Speaking of the 'Baby Love' hitmaker, Evan said: "She's involved in every piece of our wedding [and] engagement party.
"She's involved in all levels of my life. She's one of the most incredible mothers ever."
Meanwhile, Evan is keen to start a family with Ashley, who already has five year-old son, Bronx with ex-husband and Fall Out Boy bassist Pete Wentz.
He gushed: "It's up to Ashlee, but I want to have a lot of kids."

Rihanna pushed a man out of the men's toilet so that she could use it.
The 'Pour It Up' singer has been filmed entering the restroom and grabbing an unknown male by the arm before shoving him out and closing the door behind her, during her recent trip to Zouk Restaurant, Manchester on Thursday night (13.03.14).
In a video obtained by MailOnline, Drake, who had joined Rihanna at the posh restaurant, was also filmed leaving the same restroom just moments later, and while it's unclear whether the couple were inside at the same time, it's raised question as to whether the pair enjoyed a secret tryst together.
Whilst inside the restaurant, Rihanna and Drake enjoyed a private meal with 16 guests after closing down the popular eatery where they stayed until the early hours of the morning.
A source told E! News: "They were with a total of 16 people, including bodyguards and assistants. They were really enjoying themselves...The bill was about $6,000 to $7,000. We closed the entire restaurant for them."
Drake - who had been performing in the city for the UK leg of his 'Would You Like A Tour?' world tour, reportedly treated guests to tracks from his new and unreleased album.
The insider added: "They enjoyed the food and even had a dance party. They were all dancing."
The sighting is just the latest outing for the pair who appear to have rekindled their brief romance following Rihanna's on-off relationship with Chris Brown.

Jessica Alba wishes her daughter would act her age.
The 'Machete' actress claims her five-year-old daughter, Honor, loves to wear "dresses and high heels" and while she admires her daughter's enthusiasm for fashion, she thinks the tot should be spending her time playing outside like she did growing up.
Jessica told People magazine: "I'm like, 'No! [Don't you want to] climb a tree?'"
The 32-year-old star - who also has two-year-old daughter, Haven, with her husband Cash Warren - says Honor "loves" being a big sister and is willing to pass all her old clothes onto her younger sibling.
Jessica explained: "Honor's clothes get handed down to Haven, That's the way I was raised, so that's how it is for my family too."
The former 'Sin City' star also claims she is no rush to revisit the "hooker" style wardrobe she wore for her role as exotic dancer Nancy Callahan in the film adaption of the graphic novel back in 2005.
Speaking of the thigh-high boots she had to wear, Jessica joked: "They can get a bit hooker. I think they can be fine for occasional nights out, but not for every single day."
Meanwhile, Jessica claims her daughter's have already taken a liking to her extensive shoe collection.
She told London's Evening Standard newspaper: "Almost every day my daughters will dress up in their pyjamas with my shoes on. I tell them they are going to fall over, especially in the high heels, so I encourage them to play with the flats instead."

Nicole Scherzinger has congratulated Lewis Hamilton on winning his race.
The former Pussycat Doll said she she was "proud" of the Formula One race car driver when he took the pole position during a qualifying race in Melbourne on Saturday (15.03.14) ahead of Australia's Grand Prix on Sunday (16.03.14).
Nicole couldn't hold back her excitement as she tweeted: "Congratulations @LewisHamilton So proud of u 4 taking pole position! First race of the season! @f1 #AustralianGP Race ur heart out babe! xo (sic)."
Nicole's public display of affection is the latest confirmation that pair have sorted out their differences following an emotional break-up in September, as the two were spotted enjoying a romantic holiday together in Rome, Italy last week.
Lewis - who was raised as a Roman catholic - said he was "humbled" when he took to Instagram to post a picture of himself posing alongside his on-off girlfriend, Nicole at the The Sistine Chapel.
He wrote: "This was a great day....truly humbled by the Sistine Chapel plus there with my wifey. #godisthegreatest #sistinechapel #blessed (sic)."
The pair also took in several other sights during their romantic weekend including the Colosseum, Piazza Navona and the Gianicolo Hill.
While the couple have endured numerous break-ups throughout their five year relationship, a source told the Daily Mirror newspaper their reunion is for good.
The source revealed: "[Lewis] adores Nicole. They are so in love. Their circle of friends think that now they're back together they will be ­married within months."