Mila Kunis recalls 'awful' diet for 'Black Swan': Cigarettes and 1,200 calories a day

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Mila Kunis is getting honest about how she achieved her dramatic weight loss for her role as a ballerina in Black Swan.

The 32-year-old actress appeared on Howard Stern's SiriusXM show on Tuesday, when she talked about how she got the part of Lily in the critically acclaimed 2010 film. Kunis says she Skyped with director Darren Aronofsky prior to nabbing the role, who sought her out after seeing her in the comedy, Forgetting Sarah Marshall. Kunis had never had any previous experience in ballet, but trained for three months in order to "fake it." Kunis acknowledges that she got "crazy thin," as Stern puts it, weighing about 95 pounds.

"I didn't starve myself," Kunis stresses. "I did do it in the healthiest way possible. I don't recommend anybody ever doing it."

WATCH: Mila Kunis Spills All the Juicy Details on How She and Ashton Kutcher Got Together -- We Started Out as Friends With Benefits

"I had to look skinny in order to look like a ballerina," she explains. "You fake it. So, the best way to fake it is to unfortunately look like it."

The Bad Moms star says she smoked cigarettes and went on a 1,200 calories a day diet to lose the weight.

"I never watched what I ate [before]. It was one of those things, for the first time in my life, I got a food delivery service," she recalls. "And I'll tell you this -- I'm not promoting this at all -- but I used to be a smoker, and so I smoked a lot of cigarettes and I ate a limited amount of calories."

"Twelve-hundred calories and I smoked," she reiterates about her weight-loss methods. "I don't advocate this at all. It was awful."

Kunis says she has since quit smoking, and calls it the "best decision" she's ever made in her life.

Though her struggle eventually paid off. Kunis was nominated for her work in the dark drama for Best Supporting Actress at the 2011 Golden Globes, but she says she felt no pressure during awards season. The actress recalls sneaking alcohol during the Oscars and happily taking shots.

PHOTOS: Mila Kunis through the years

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Mila Kunis attends the premiere of Warner Bros. Pictures' "Jupiter Ascending" at TCL Chinese Theatre on Monday, Feb. 2, 2015, in Hollywood, Calif. (Photo by Paul A. Hebert/Invision/AP)
Mila Kunis attends Burberry's "London in Los Angeles" event at the Griffith Observatory on Thursday, April 16, 2015. (Photo by Jordan Strauss/Invision/AP)
Mila Kunis seen at Warner Bros' Los Angeles Premiere of "Jupiter Ascending" on Monday, Feb 2, 2015, in Los Angeles. (Photo by Eric Charbonneau/Invision for Warner Bros./AP Images)
Mila Kunis and Eddie Redmayne seen at Warner Bros' Los Angeles Premiere of "Jupiter Ascending" on Monday, Feb 2, 2015, in Los Angeles. (Photo by Eric Charbonneau/Invision for Warner Bros./AP Images)
HOLLYWOOD, CA - FEBRUARY 02: Actors Channing Tatum, Mila Kunis, Sean Bean, and David Ajala arrives at the Premiere of Warner Bros. Pictures' 'Jupiter Ascending' at TCL Chinese Theatre on February 2, 2015 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - DECEMBER 19: Mila Kunis (L) and Ashton Kutcher attend a basketball game between the Oklahoma City Thunder and the Los Angeles Lakers at Staples Center on December 19, 2014 in Los Angeles, California. (Photo by Noel Vasquez/GC Images)
LOS ANGELES, CA - DECEMBER 19: Actors Ashton Kucher and Mila Kunis react after being shown on the video board during the 'kiss me camera' feature during the game between the Oklahoma City Thunder and the Los Angeles Lakers at Staples Center on December 19, 2014 in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Stephen Dunn/Getty Images)
LOS ANGELES - DECEMBER 10: Actress Mila Kunis with Craig Ferguson on THE LATE LATE SHOW WITH CRAIG FERGUSON, scheduled to air Wednesday, Dec. 10, 2014 on the CBS Television Network. (Photo by Monty Brinton/CBS via Getty Images)
LOS ANGELES - DECEMBER 10: Actress Mila Kunis with Craig Ferguson on THE LATE LATE SHOW WITH CRAIG FERGUSON, scheduled to air Wednesday, Dec. 10, 2014 on the CBS Television Network. (Photo by Monty Brinton/CBS via Getty Images)
LOS ANGELES, CA - JUNE 28: Actors Mila Kunis and Ashton Kutcher attend the game between the St. Louis Cardinals and the Los Angeles Dodgers at Dodger Stadium on June 28, 2014 in Los Angeles, California. The Dodgers won 9-1. (Photo by Stephen Dunn/Getty Images)
HOLLYWOOD, CA - JUNE 09: Actress Mila Kunis arrives at the Los Angeles premiere of 'Third Person' at Pickford Center for Motion Study on June 9, 2014 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
HOLLYWOOD, CA - JUNE 09: Actress Mila Kunis arrives at the Los Angeles premiere of 'Third Person' at Pickford Center for Motion Study on June 9, 2014 in Hollywood, California. (Photo by Gregg DeGuire/WireImage)
INDIO, CA - APRIL 25: Actors Ashton Kutcher (L) and Mila Kunis attend day 1 of 2014 Stagecoach: California's Country Music Festival at the Empire Polo Club on April 25, 2014 in Indio, California. (Photo by Frazer Harrison/Getty Images for Stagecoach)
LOS ANGELES, CA - APRIL 13: Actress Mila Kunis poses in the press room at the 2014 MTV Movie Awards at Nokia Theatre L.A. Live on April 13, 2014 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - APRIL 13: Actress Mila Kunis speaks onstage at the 2014 MTV Movie Awards at Nokia Theatre L.A. Live on April 13, 2014 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images for MTV)
LAS VEGAS, NV - MARCH 27: (L-R) President, Domestic Distribution, Warner Bros. Pictures Dan Fellman, actress Mila Kunis and CEO of Warner Bros. Entertainment Kevin Tsujihara attend Warner Bros. Pictures' “The Big Picture”, an Exclusive Presentation Highlighting the Summer of 2014 and Beyond during CinemaCon, the official convention of the National Association of Theatre Owners, at The Colosseum at Caesars Palace on March 27, 2014 in Las Vegas, Nevada. (Photo by Alberto E. Rodriguez/Getty Images for CinemaCon)
LOS ANGELES, CA - MARCH 22: Mila Kunis (L) and Ashton Kutcher attend a basketball between the Detroit Pistons and the Los Angeles Clippers at Staples Center on March 22, 2014 in Los Angeles, California. (Photo by Noel Vasquez/GC Images)
LOS ANGELES, CA - MARCH 04: Ashton Kutcher (L) and Mila Kunis attend basketball games between the New Orleans Pelicans and the Los Angeles Lakers at Staples Center on March 4, 2014 in Los Angeles, California. (Photo by Noel Vasquez/GC Images)
LOS ANGELES, CA - MARCH 04: Mila Kunis (Detail) attends a basketball game between the New Orleans Pelicans and the Los Angeles Lakers at Staples Center on March 4, 2014 in Los Angeles, California. (Photo by Noel Vasquez/GC Images)
NEW YORK, NY - FEBRUARY 19: Jim Beam Bourbon welcomes its first-ever global partner and spokesperson, Mila Kunis, to the family with a 'Make History' cocktail reception on February 19, 2014 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Jim Beam)
BEVERLY HILLS, CA - JANUARY 12: 71st ANNUAL GOLDEN GLOBE AWARDS -- Pictured: Actress Mila Kunis arrives to the 71st Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 12, 2014 -- (Photo by Christopher Polk/NBC/NBC via Getty Images)
LOS ANGELES, CA - JANUARY 03: Ashton Kutcher (R) and Mila Kunis attend a basketball game between the Utah Jazz and the Los Angeles Lakers at Staples Center on January 3, 2014 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
Ashton Kutcher, center right, and Mila Kunis walk along the sideline before the NFL football game between the Pittsburgh Steelers and the Chicago Bears at Heinz Field on Sunday, Sept. 22, 2013, in Pittsburgh. (AP Photo/Don Wright)
CHICAGO, IL - JULY 11: Ashton Kutcher and Mila Kunis watch from the stage as Robin Thicke performs during the 2013 Taste Of Chicago at Grant Park on July 11, 2013 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)
LOS ANGELES, CA - FEBRUARY 12: Mila Kunis (L) and Ashton Kutcher attend a basketball game between the Phoenix Suns and the Los Angeles Lakers at Staples Center on February 12, 2013 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
FOX's 25TH ANNIVERSARY SPECIAL: Actors from the FOX series 'That '70s Show'; L-R: Ashton Kutcher, Mila Kunis, Wilmer Valderrama and Laura Prepon reunite for FOX's 25TH ANNIVERSARY SPECIAL airing Sunday, April 22 (8:00-10:00 PM ET/PT) on FOX. (Photo by FOX via Getty Images)
HOLLYWOOD, CA - JANUARY 16: Actor Ashton Kutcher (L) and Actress Mila Kunis during the FOX Television Critics Association Press Tour on January 16, 2004 at the Renaissance Hollywood Hotel in Hollywood, CA. (Photo by Kevin Winter/Getty Images)
383262 34: From left to right, 'That 70''s Show' cast members Ashton Kutcher, Mila Kunis, and Danny Masterson arrive at the premiere of USA Films'' 'Traffic' December 14, 2000 at the Academy of Motion Pictures Arts and Sciences Theatre in Beverly Hills, CA. (Photo by Chris Weeks/Liaison)
LOS ANGELES, CA - SEPTEMBER 13: (L-R) Wilmer Valderrama, Topher Grace, Laura Prepon, Danny Masterson, Mila Kunis and Ashton Kutcher attend 50th Annual Primetime Emmy Awards on September 13, 1998 at the Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
THAT '70S SHOW - (Clockwise from top) Topher Grace as Eric, Wilmer Valderrama as Fez, Lisa Robin Kelly as Laurie, Ashton Kutcher as Kelso, Mila Kunis as Jackie, Danny Masterson as Hyde and Laura Prepon as Donna and on THAT 70s SHOW on FOX. (Photo by FOX via Getty Images)
THAT '70S SHOW - Top row L-R: Wilmer Valderrama, Ashton Kutcher, Danny Masterson, Topher Grace, Laura Prepon. Center L-R: Don Stark, Tanya Roberts, Mila Kunis, Lisa Robin Kelly, Debra Jo Rupp, Kurtwood Smith. (Photo by FOX via Getty Images)
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"I think I, at the Oscars, had the best time of anybody, because I snuck liquor in, I did shots," she laughs. "I knew I was not going to win. It just didn't even cross my mind, it doesn't even matter. Like, I literally had the best time. I was like, 'This is crazy, you guys, is anyone else aware of how crazy this is?!'"

"At this point I had a routine on my way to the awards show, like, 'Shot of vodka in the car, woo hoo!'"

Kunis says getting acting accolades has never been important to her.

"I love what I do but I don't need to win," she explains. "Like, I just need to work."

WATCH: Mila Kunis Talks Dating Macaulay Culkin -- 'You Couldn't Walk Down the Street With Him'

Kunis also opened up about how her relationship with husband Ashton Kutcher turned romantic after previously just being former That '70s Show co-stars during her candid interview with Stern, admitting that the two were at first "friends with benefits."

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