Kirsten Dunst believes she would be thinner if she was single.
The 32-year-old actress - who is currently in a relationship with Garrett Hedlund - thinks she has gained weight since she started dating her fellow actor.
She told Net-a-Porter's The Edit: "I've got a little bit more of a tummy now, so although I own about 20 pairs of jeans, I'll wear the same three for a year because the rest are from when I was skinnier.
"I guess if I wasn't comfortable and in a relationship I'd be thinner. When you're with someone, you eat so much more and you chill out for a bit--but I don't criticise myself more than is healthy, because there's such a lot of that, isn't there?"
The 'Upside Down' star also slammed some women and magazines for their negative portrayal of the female body image.
She said: "Whether it's girls among themselves or magazines, it's all about women tearing apart other women.
"I don't get why that's so prevalent right now."
Meanwhile, Kirsten has admitted she is ready to settle down with her beau.
She added: "Thirty-three is a good age to have your first baby. I'm in baby mode because two of my really good friends are pregnant right now."

Ethan Hawke knew Robin Williams was in pain.
The 43-year-old actor revealed his co-star in 'Dead Poets Society' - who committed suicide last month after a battle with depression - had been in pain since he was young.
Speaking to CBC Q Radio's Jian Ghomeshi, Ethan said: "Even at 18, it was obvious that he was in a tremendous amount of pain.
"I don't know to what extent his whole life... Anybody who was watching knew. A lot of people aren't watching, actually, because he's so funny and so light."
Meanwhile, Ethan praised his fellow actor for his "sensitive heart".
He added: "He moved us all. There was a very serious mind there. He was also so sentimental, just this big, sensitive heart.
"When we lose a great, great clown - that's what he was - there are people who are scared of that word a little bit, but he was a light for the world."
Ethan spoke of "immediate sadness" on hearing about the death of his long-time friend.
He said: "I feel like there's an immediate sadness that is pervasive in the whole community when somebody who made all of us so happy reveals themselves to have been in tremendous personal pain.
"The happiness wasn't reciprocal. We didn't make him happy. That somehow rings to all of us."

Nicole Kidman is "devastated" and "beside herself" after the death of her father.
The 47-year-old actress is seeking support from her husband Keith Urban after the tragic loss of her father, Dr. Anthony Kidman, who suffered from an apparent heart attack in Singapore.
An insider told Us Weekly, "Nicole is beside herself. Keith vowed to be with her as long as he needs to during this horrible time and he is supporting his wife to the fullest.
"She is beyond devastated and in total shock."
Dr Kidman was in Singapore visiting Nicole's younger sister Antonia, who lives there with husband Craig Marran and their six children.
Nicole's rep added to HollywoodLife.com: "Nicole and her family are in shock by the sudden death of her father.
"She appreciates the outpouring of support and kindly requests privacy during this very difficult time."
Keith has pulled out of his scheduled show at Washington State Fair on September 13th and the couple have reportedly made plans to fly out to Australia for the funeral.

Vanessa Hudgens has shown her support for her grieving boyfriend Austin Butler following the tragic death of his mother.
The 'Carrie Diaries' actor first broke the news that his mum, Lori Butler, had passed away on Thursday (11.09.14) by taking to his Twitter page.
A heartbroken Austin wrote: "Lori Butler, my mom, my hero, & my best friend passed away this morning. Lets all celebrate her. I love you and will miss you every day Mom. (sic)"
His girlfriend of three years, Vanessa Hudgens, also paid her respects to her beau's late mother as she retweeted Austin's and added: "I miss you already mama."
She later tweeted: "#ripLoriButler #celebrateLori spread the love for Lori (sic)"
The 'High School Musical' actress' mother Gina Hudgens also shared her sympathies on the social media site, as she shared: "Lori, RIP. You'll be forever alive in our hearts & mind. You'll always be our angel in heaven watching over us. U will be missed! (sic)"
Gina then added: "Lori, we love you! Rest in peace! You will be missed! (sic)"
A source told Us Weekly Lori had been battling cancer before sadly passing away.

Nicki Minaj was left stunned when her offer to go and speak to students at her former school was declined by the principle.
The rapper wanted to give a talk to teenagers at LaGuardia High School in New York City to inspire them to pursue their goals and work hard.
Nicki - whose highly sexual video for 'Anaconda' has been criticised in some sections of the media - wanted to do it because of the positive experience she had herself at the educational facility but she was told she wasn't welcome.
Revealing the snub in a series of Twitter posts, she wrote: "That school changed my life and I wanted to pay it forward to the students there now. I was really looking forward to it ... I guess I'm not good enough ... I wanted to go back to my HS and speak to the students but the new principal declined. No need for me to inspire them, I guess. Smh (sic)"
Her follower @JorianTM tweeted her the message: "@NICKIMINAJ wooow that's so unfair. Did he give any reason why? (sic)"
To which Nicki, 31, replied: "It's a WOMAN. And not really (sic)"
Many of the pop star's fans posted messages of support following her revelation.
User @RayYoWTF posted: "Does she not know how much Nicki impacts this generation?"
While @ACminaj95 credited Nicki with motivating him to go to university, tweeting: "Because of Nicki's drive, I applied to two universities. Like I never thought I'd be at that point in my life. (sic)"
Following her posts, the New York City Department of Education has made the decision to investigate Nicki's claim.

Rochelle Humes "cried like a baby" after dropping her daughter off to nursery.
The Saturdays singer took 16-month-old Alaia-Mai - her child with husband Marvin Humes - to her first non-parent supervised morning at daycare on Friday (12.09.14) and after saying goodbye to the tot she got in her car and sobbed because she missed her so much.
She revealed on Twitter: "1st day of dropping Alaia to nursery and not staying. Kids were fine, Mums not so much. Just got in the car and cried like a baby. (sic)"
Rochelle felt stupid for being so emotional because Alaia-Mai was only spending a morning at nursery.
In another tweet she wrote: "I wouldn't mind she's only there till 12.30 (sic)"
Rochelle did enjoy the first day she took Alaia-Mai in to nursery and got to stay and play with her.
In a Twitter post from earlier in the week, she said: "Settling Alaia in at nursery, I forgot how small class room chairs are... (sic)"
Rochelle, 25, is currently on the 'Greatest Hits Live!' UK tour with The Saturdays - also made up of Una Foden, Mollie King, Frankie Sandford and Vanessa White.
The girl group's next show is at Nottingham Royal Concert Hall tonight and they play the O2 Apollo Manchester on Sunday (14.09.14).

Nicole Kidman's father died after suffering a heart attack inside a Singaporean hotel restaurant, according to reports.
Dr. Antony Kidman is believed to have passed away this morning (12.09.14) following a sudden heart attack while he was dining at the Wheelhouse restaurant at the Tanglin Club hotel before being rushed to Tan Tock Seng Hospital where he was pronounced dead.
The clinical psychologist - who was in his 80s - had been holidaying in Singapore as he visited his daughter Antonia and his six grandchildren.
According to The Straits Times, paramedics were called to the scene after a doctor and several guests at the hotel failed to resuscitate Antony, who had just arrived at the restaurant following his morning exercise.
The police have announced they will be investigating the exact cause of death.
Nicole's publicist, who is also a close friend of the family, Wendy Day confirmed that Antony had suffered a fall after eating his breakfast.
She told Daily Mail Australia: "The family is in shock and is grieving ... I think that some time and privacy is needed to deal with this shock and tragedy."
The father of the Oscar-winning actress was a well-respected clinical psychologist at Royal North Shore Hospital in Australia and a director of health psychology at the University of Technology Sydney (UTS) where he had worked for more than four decades.
A hospital worker told News Corp Australia: "We don't know how to deal with this at the moment or how to digest the fact he's gone."
In a statement, UTS Vice-Chancellor Professor Attila Brungs said: "It is with great sadness that we learn of Dr Tony Kidman's sudden passing.
"During his 43 years at the University of Technology, Sydney, Tony has contributed greatly - as a colleague, as a researcher, and as a health practitioner.
"Tony will be missed by all at UTS. Our thoughts are with his family at this time."

Britain's Duchess Camilla has spoken for the first time about the moment she was told her brother had died.
The 67-year-old royal - the wife of Prince Charles - received the heartbreaking news about Mark Shand's passing "on a glorious early Spring day in Scotland."
In an article published in The Times newspaper, she said: "An anguished voice on the other end told me that something terrible had happened to my brother; my indestructible brother, Mark. Surely nothing could have happened to him? ... My charismatic and sometimes infuriating brother, who had survived tsunamis, shipwrecks, poisoned arrows and even the fearsome Komodo dragons, was no longer with us."
Mr. Shand sadly passed away in April after he fell and smashed his head on the pavement in New York after attending an auction for The Elephant Family charity, which he co-founded in 2002.
Camilla then went on to talk about her brother's passion for protecting Asian elephants, which began when he rescued Tara during a visit to India in 1988.
Speaking ahead of her sibling's memorial service yesterday (11.09.14), she said: "They embarked on a thousand mile journey across the north of India and by its finale he was in love. This was the start of his life-long passion for India and his quest for the survival of the Indian Elephant.
She added: "They say that elephants never forget; Tara never forgot him and neither will we..."

Queen Elizabeth's horse Estimate won the Doncaster Cup today (12.09.14).
The 88-year-old monarch will have no doubt been celebrating when her thoroughbred equine raced to victory in the flat race at Doncaster Racecourse, South Yorkshire, on Friday.
Following the horse's impressive win, the five-year-old filly's jockey Ryan Moore insisted the victory was never in doubt.
He said: "She was never going to get beat today, she travelled so sweetly. I never really had to ask her a serious question."
Estimate's trainer Sir Michael Stoute also heaped praise on the equine.
Speaking on 'Channel 4 Racing', he said: "She can be a bit narky. It was great seeing her win. Goodwood didn't suit her, it was a bit too firm for her."
Estimate's latest triumph comes after she failed to retain the Gold Cup at Royal Ascot in June.
While she was cheered on by the queen, who took up her place in the Royal Box, the filly could only manage second place in the race, losing out to Irish contender Leading Light.
But Moore rode the horse to victory in the Royal Ascot showpiece in 2013, making it the first time the Gold Cup had been won by a reigning monarch.

Chaka Khan loves touching her audience.
The 'Ain't Nobody' hitmaker has revealed she prefers playing intimate venues - in particular the iconic London jazz club Ronnie Scott's - because she feels closer to her audience and enjoys being able to reach out and touch her fans.
She told MTV: "I love to touch the audience. When I played Ronnie Scott's, it was so intimate, I could really reach out and physically touch people."
The 70s singer - who released her first solo single 'I'm Every Woman' in 1978 and fronted the funk band Rufus - made the admission during a quick fire interview with the music channel in which she also admitted her son, Damien, failed to recognise one of her most famous tracks 'Sweet Thing' when it was covered by R&B singer Mary Blige 18 years later.
She explained: "I remember when my son came home from school and said, 'I just heard Sweet Thing by Mary J Blige'.
"I had to explain to him, 'Honey that's my song!'"
Despite enjoying a career that has spanned five decades, the 61-year-old singer admitted there were times when she thought about giving up music.
She said: "There have been many times when I've thought... what the hell am I doing?
"Life has many faces. It's not an easy, sweet ride."

Sir Tim Rice will receive the BMI Icon award.
The lyricist will be presented with the accolade at the BMI London Awards, which will be held at the Dorchester Hotel on October 13, 2014.
The famed songwriter is best known for his collaborations with the composer Sir Andrew Lloyd-Webber, with whom wrote the musicals, 'Evita' and 'Joseph and the Amazing Technicolor Dreamcoat'.
He has also worked closely on several Disney films, including 'The Lion King', 'Aladdin' and 'Beauty and the Beast'.
Upon hearing the news, Sir Tim dedicated his award to fellow music legends who have helped him along the way.
He said: "I owe it all to Tommy Steele, Lonnie Donegan, Billy Fury, Marty Wilde, Cliff Richard and Joe Brown."
BMI President and CEO, Michael O'Neill said: "Sir Tim Rice's extraordinary creativity has given the world some of the most beloved songs of the past 50 years, sheer musical poetry that has thrilled audiences in films, musical theatre and on chart-topping recordings.
"He is one of our era's most admired and respected lyricists, a leading author and sough-after commentator. We are immensely proud to honor him as a BMI Icon."
The 69-year-old lyricist has also received three Best Song Oscars for "A Whole New World" (with Alan Menken), "Can You Feel The Love Tonight" (with Elton John), and "You Must Love Me" (with Andrew Lloyd Webber).
Previous winners of the BMI Icon Award include, the Sex Pistols frontman John Lydon, the rock band Queen, Ray Davies, Van Morrison and the musician Bryan Ferry.

James Franco wants to direct another two films based on William Faulkner's novels.
The 36-year-old actor-and-director has admitted that he would love to adapt another two novels by the modernist author, after starring in 'The Sound and the Fury' which is based on the 1929 book by the American writer.
Talking to The Guardian newspaper, James shared: "There's two more Faulkners we want to do: 'The Hamlet' and 'The Bear'. 'The Bear' would be difficult, just because you need a trained bear, but nowadays you could probably do a CGI or motion capture, like in 'Planet of the Apes'."
When asked why he feels such a connection to the author, who died in 1962, the handsome actor replied: "He's the granddaddy of southern writers. He's our high modernist writer. He goes hand in hand with James Joyce and Virginia Woolf and [Marcel] Proust. He's like our version of all of that.
"I think his best books are 'As I Lay Dying' and 'The Sound and the Fury', the two books that I've adapted. The world within the film takes place in the 1920s or earlier, but his writing is so complex and unusual that it allows me to use very contemporary film techniques and editing styles."
James then added that William's modernist writing style does make it more complicated for him as a director, but was quick to point out that he doesn't dislike this aspect of adapting the novels.
He said: "That's one of the reasons that I do it. It pushes me as a filmmaker to find solutions, and filmic techniques that I normally wouldn't use. I have to think, 'How do you get stream of consciousness?' And, 'How are we going to tell this non-linear story?' "