Kristen Bell and Mila Kunis' daughters are still big Frozen fans.
ET spoke with the A Bad Moms Christmas co-stars at the Los Angeles premiere of the film on Monday, where they dished about their daughters' Halloween costumes -- and how they've both been roped into dressing up as Elsa this year.
"My daughter, Wyatt, six months ago, I was, like, 'Buddy, what do you want to be for Halloween?'" Kunis, 34, tells ET's Cameron Mathison. "She's like, 'I'm going to be Cinderella, and you're going to be Elsa.' I was like, 'No, that's cute, so you're going to be an awesome super hero and mom is going to be, like, Han Solo,' and she's like, 'Yeah, OK.' Cut to yesterday. I was Elsa and Wyatt was Cinderella."
Kunis says that her family, including husband Ashton Kutcher and 11-month-old son Dimitri, already celebrated the holiday over the weekend at their neighbor's Halloween party -- making room for her to watch game six of the World Series between the Los Angeles Dodgers and the Houston Astros on Tuesday night. Kunis and Kutcher are well-known Dodgers fans, and Kunis attended game two of the World Series.
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Mila Kunis out and about
Mila Kunis out and about
LAS VEGAS, NV - MAY 20: Actor Mila Kunis attends the 2018 Billboard Music Awards at MGM Grand Garden Arena on May 20, 2018 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)
LAS VEGAS, NV - MAY 20: Actor Mila Kunis attends the 2018 Billboard Music Awards at MGM Grand Garden Arena on May 20, 2018 in Las Vegas, Nevada. (Photo by Jon Kopaloff/FilmMagic)
LAS VEGAS, NV - MAY 20: Recording artist Taylor Swift (L) accepts the Top Selling Album award for 'Reputation' from actor Mila Kunis onstage during the 2018 Billboard Music Awards at MGM Grand Garden Arena on May 20, 2018 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
HOLLYWOOD, CA - MAY 03: Actors Zoe Saldana and Mila Kunis attend the ceremony honoring Zoe Saldana with star on the Hollywood Walk of Fame on May 3, 2018 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LAS VEGAS, NV - APRIL 26: Mila Kunis attends the 2018 CinemaCon - Lionsgate Presentation For 2018 Summer And Beyond held at The Colosseum at Caesars Palace on April 26, 2018 in Las Vegas, Nevada. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - APRIL 11: Actors Ashton Kutcher and Mila Kunis attend the game between the Los Angeles Dodgers and the Oakland Athletics at Dodger Stadium on April 11, 2018 in Los Angeles, California. (Photo by Jayne Kamin-Oncea/Getty Images)
MOUNTAIN VIEW, CA - DECEMBER 03: Actors Ashton Kutcher (L) and Mila Kunis attend the 2018 Breakthrough Prize at NASA Ames Research Center on December 3, 2017 in Mountain View, California. (Photo by C Flanigan/FilmMagic)
WESTWOOD, CA - OCTOBER 30: Actress Mila Kunis attends the premiere of STX Entertainment's 'A Bad Moms Christmas' at Regency Village Theatre on October 30, 2017 in Westwood, California. (Photo by Allen Berezovsky/WireImage for Fashion Media )
NEW YORK, NY - SEPTEMBER 25: Global brand partner Mila Kunis attends the official launch party for Jim Beamï¿½ Vanilla, the newest flavored product from Jim Beamï¿½ Bourbon, on Monday, September 25, 2017 in New York City. (Photo by Michael Loccisano/Getty Images for Jim Beam)
LAS VEGAS, NV - MARCH 28: Actress Mila Kunis at CinemaCon 2017 The State of the Industry: Past, Present and Future and STX Films Presentation at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, on March 28, 2017 in Las Vegas, Nevada.(Photo by Jeffrey Mayer/WireImage)
LOS ANGELES, CA - OCTOBER 19: Actors Ashton Kutcher and Mila Kunis talk with Los Angeles Dodgers Outfield Andre Ethier (16) during game four of the National League Championship Series between the Chicago Cubs and the Los Angeles Dodgers on October 19, 2016, at Dodger Stadium in Los Angeles, CA. (Photo by Chris Williams/Icon Sportswire via Getty Images)
NEW YORK, NY - JULY 28: (L-R) Denise Albert, actresses Kathryn Hahn and Mila Kunis, and Melissa Musen Gerstein attend the Mamarazzi Screening Of 'Bad Moms' at AMC Empire on July 28, 2016 in New York City. (Photo by Monica Schipper/WireImage)
NEW YORK, NY - JULY 28: Cast member of the film 'Bad Moms,' Mila Kunis rings the closing bell at NASDAQ on July 28, 2016 in New York City. (Photo by Gary Gershoff/WireImage)
WESTWOOD, CA - JULY 26: Actress Mila Kunis arrives at the premiere of STX Entertainment's 'Bad Moms' at Mann Village Theatre on July 26, 2016 in Westwood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0504 -- Pictured: Actress Mila Kunis on July 20, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JULY 20: Mila Kunis attends AOl Build to discuss her new movie 'Bad Mom' at AOL HQ on July 20, 2016 in New York City. (Photo by Daniel Zuchnik/WireImage)
NEW YORK, NY - JULY 18: Pregnant Mila Kunis arrives at the 'Bad Mom' premiere After Party at The Blond in Soho on July 18, 2016 in New York, NY. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - JULY 18: (L-R) Annie Mumolo, President of STX Entertainment Sophie Watts, Mila Kunis and Kathryn Hahn attend the after party for the 'Bad Moms' premiere at Metrograph on July 18, 2016 in New York City. (Photo by Neilson Barnard/Getty Images)
OAKLAND, CA - JUNE 5: Ashton Kutcher and Mila Kunis attend Game Two of the 2016 NBA Finals between the Golden State Warriors and the Cleveland Cavaliers on June 5, 2016 at ORACLE Arena in Oakland, 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. Mandatory Copyright Notice: Copyright 2016 NBAE (Photo by Andrew D. Bernstein/NBAE via Getty Images)
LAS VEGAS, NV - MAY 22: (L-R) Actresses Kristen Bell, Kathryn Hahn and Mila Kunis arrive at the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Allen Berezovsky/Getty Images)
LAS VEGAS, NV - MAY 22: Actress Mila Kunis attends the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Todd Williamson/Getty Images for dcp)
LAS VEGAS, NV - APRIL 14: Actress Mila Kunis, one of the recipients of the Female Stars of the Year Award, attends the CinemaCon Big Screen Achievement Awards brought to you by the Coca-Cola Company at Omnia Nightclub at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, on April 14, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
LAS VEGAS, NEVADA - APRIL 12: Mila Kunis arrives at CinemaCon 2016 - STX Entertainment 'The State Of The Industry: Past, Present And Future held at The Colosseum at Caesars Palace on April 12, 2016 in Las Vegas, Nevada. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - MARCH 28: Mila Kunis is seen at 'Jimmy Kimmel Live' on March 28, 2016 in Los Angeles, California. (Photo by gotpap/Bauer-Griffin/GC Images)
"So, our daughter thought Halloween was on Saturday," Kunis says, adding that Kutcher dressed up as a prince, while Dimitri went to the party as a mouse. "Huge party, lots of trick or treating for, like, two hours. Jacked up on candy, 200 kids. It was, like, full-blown Halloween. So, tomorrow night -- Dodgers."
But Kunis admits that her princess costume didn't exactly suit her.
"I had a blonde wig on, I make a hideous Elsa," she jokes. "Like, the world's most unattractive human being."
As for 37-year-old Bell, she hilariously admits that she tried to convince her daughter to dress up as Frozen's Anna instead -- the character she voiced in the hit 2013 Disney film -- though she just wasn't having it.
"Of course I did," Bell deadpans when asked if she took her daughter's costume choice personally. "I said, 'Number one, you are a kid -- you are supposed to have your finger on the pulse. You are two years too late. What's hot, what's new, you gotta fill me in.' I just learned Instagram."
Bell later adorably reveals that her daughter loves to match with her famous mama.
"She was like, 'Mommy, you have to be Elsa, please, 'cause I want to be Elsa,' and she really likes matching," Bell shares. "Like, she was wearing a green dress today, so I chose green eye shadow. Like, we have a thing."
Sonny & Cher #HalloWKKWeen https://t.co/nXStzZnrTs
Happy Early Halloween & Happy Birthday Gorgeous ❤️
Academy Awards 1991
LOS ANGELES, CA - OCTOBER 27: Amal Clooney, Rande Gerber and Cindy Crawford attend Casamigos Halloween Party on October 27, 2017 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images for Casamigos Tequila)
Don’t tell me it’s a Fancy dress Party! Poison Ivy came out early this year! P.s performing in this wasn’t that easy! Lol #anywhere #kisshousepartylive
A little game of cat and mouse last night 😻
NEW YORK, NY - OCTOBER 28: Paris Hilton and Nicky Hilton Rothschild attend amfAR & The Naked Heart Foundation Fabulous Fund Fair at Skylight Clarkson Sq on October 28, 2017 in New York City. (Photo by Kevin Tachman/amfAR2017/WireImage)
#strangerthings have happened #happyhalloween
Everyone else can go home Demi Lovato just won Halloween https://t.co/W6G6QuDYgF
And from the front. #hedwigandtheangryinch 💋
#juno #happyhalloween @kellysawyer and I 👫
Nas, dressed as Richard Pryor, attended a bash at Goldbar where the crowd enjoyed themed cocktails made with Tequila Don Julio.
If she doesn't scare you no evil thing will... I’m sharing this years halloween costume on laurenconrad.com today 👻🎃🕷
When your daughter demands you BOTH be ELSA for Halloween...you GRIN AND FORKING BEAR IT.
Baby Girl Aaliyah https://t.co/5GUHkNJgNi
I'll be looking for one of these today. #icrackmyselfup
1st rule of fight club.
Strangé & Eddie
LOS ANGELES, CA - OCTOBER 27: Derek Hough (L) and Hayley Erbert attend Casamigos Halloween Party on October 27, 2017 in Los Angeles, California. (Photo by Michael Kovac/Getty Images for Casamigos Tequila)
Kendrick Lamar as Jesus Christ.
Imperfection is beauty, madness is genius and it's better to be absolutely ridiculous than absolutely boring. - Marilyn Monroe
STRANGER THINGS SEASON 2! There are two Eleven’s in town 👣 Thank you @Lyft for giving me a the most radical free ride and for sharing my love of this brilliant show. #lyftstrangemode
FREAKSHOW 📸 @eliastahan
The party was hoppin’ last night 🎃 #halloween #squad #lanights #RnB #bachelornation
Let the Halloween festivities begin! 🎃👻💀
PHILADELPHIA, PA - OCTOBER 28: Actresses Sarah Paulson and Holland Taylor are seen arriving at film director M. Night Shyamalan's Halloween party 'Shyamaween' on October 28, 2017 in Philadelphia, Pennsylvania. (Photo by Gilbert Carrasquillo/GC Images)