Entertainment Movies From Rumer Willis to Maya Hawke: All the Famous Kids in 'Once Upon a Time... in Hollywood' Quentin Tarantino's Once Upon a Time... in Hollywood stars a slew of A-list stars, including some of Tinseltown's most famous kids By Alexia Fernández Updated on December 21, 2022 05:28 PM Share Tweet Pin Email Quentin Tarantino's Once Upon a Time… in Hollywood takes place in Tinseltown and brings to life some of Hollywood's most famous personalities. From Steve McQueen to Bruce Lee to Sharon Tate, Tarantino takes audiences through an epic era in Hollywood — and it makes sense the auteur would include as many A-listers as possible, including their kids. Rumer Willis stars in the film as Joanna Pettet, a close friend of Tate's (played by Margot Robbie). Willis is the oldest daughter of Bruce Willis and Demi Moore. She was revealed as the lion on The Masked Singer in 2019. The actress has also appeared in films like Hostage (2005) — alongside her famous father — and The House Bunny (2008), as well as the competition show Dancing with the Stars. Willis leads the pack in a list of famous kids, such as Margaret Qualley. Kevin Winter/Getty Qualley shares most of her screen time with Brad Pitt as Pussycat, portraying the Manson family member Cat, who charms Pitt's Cliff Booth. The actress is the daughter of Andie MacDowell and former model Paul Qualley and rose to fame playing Justin Theroux's daughter, Jill, on The Leftovers. Qualley auditioned for the role of Pussycat and got a callback asking her to prepare for a chemistry test with Pitt. All About Once Upon a Time in Hollywood Breakout and Andie MacDowell's Daughter Margaret Qualley "I was like, 'Nooo, that's crazy!" Qualley recalled to Entertainment Weekly in July 2019. Qualley has also starred on FX's Fosse/Verdon and Netflix's Maid, earning Emmy nominations in 2019 and 2022, respectively. Maya Hawke also stars as the Manson Family member Flower Child. The daughter of Ethan Hawke and Uma Thurman — who was Tarantino's muse in 1994's Pulp Fiction and Kill Bill: Vols 1 and 2 — Maya has starred on Stranger Things since 2019 and appeared in the films Fear Street Part One: 1994 (2021) and Do Revenge (2022). Andrew Cooper/Columbia Maya Hawke. The young actress told The Hollywood Reporter in 2019 that she prepared for her audition with her dad in her bedroom. "We sent in the tape to Quentin, and I got a callback," she said, adding that the callback process "was unlike anything I've ever been through … except for maybe [an] audition for drama school." RELATED VIDEO: Ethan Hawke Proudly Applauds Daughter Maya's Stranger Things Role: 'She's the Real Thing' Harley Quinn Smith, who has a small role in the film, is the daughter of Clerks director Kevin Smith and actress Jennifer Schwalbach Smith. Harley stars as another Manson family member and told PEOPLE at San Diego Comic-Con 2019 that working with Tarantino was a "dream." "I auditioned for it, and then I didn't hear about it for three to four months, so I totally thought it was gone," she said. "I tried to get over it because I was sad about it." Harley Quinn Smith. She continued, "I heard about it months later, so it was such a huge surprise. Sort of like, 'Oh my god, what?' Working with him is a dream, to see his mind work and see what his process is." Once Upon a Time in… Hollywood Fact-Checked: What the Movie Gets Right and Wrong "He's definitely the most visual director I've ever worked with," Smith added. "He knows exactly what he wants it to sound like, what he wants it to look like, body language, he sees it all in his head, which is so cool to me. Seeing him put what's in his mind out into the world and make it happen, it was so mind-blowing to me to see such an icon." The actress also starred in her father's Jay and Silent Bob Reboot (2019) alongside Jason Mewes, Ben Affleck and Matt Damon and had a supporting role on season 1 of Freeform's Cruel Summer. Once Upon a Time… in Hollywood premiered on July 26, 2019.