Cass Elliott and Jessica Gunning Donaldson Collection/Getty Images; Savion Washington/Getty Images Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment Jessica Gunning, the Emmy and BAFTA-winning star of Netflix sensation Baby Reindeer, has been cast to play singer Cass Elliot in a biopic from Peter Jaysen and Alan Gasmer's Veritas Entertainment. The movie will be based on the memoir My Mama Cass, written by Elliot's daughter, Owen Elliot-Kugell. Novelist and screenwriter Emma Forrest will be adapting the book for the screen. Veritas, which was recently behind Bob Dylan movie A Complete Unknown, has packaged the project, which is being shared with financiers. Related Stories Movies 'The Christophers' Review: Michaela Coel's Steely Self-Possession and Ian McKellen's Scalding Wit Are an Irresistible Match in Steven Soderbergh's Tart Art Comedy General News 'Baby Reindeer' Star Jessica Gunning, 'One Day' Breakout Ambika Mod Among Women in Film & TV Award Winners Elliot came to prominence as a member of the musical group The Mamas & the Papas, earning a Grammy award and later releasing several solo albums. She is known for songs like "Monday, Monday" and "Make Your Own Kind of Music." The project is described as "not a traditional Mamas & the Papas biopic," but instead, "a definitive Cass Elliot film." According to today's announcement, the story will "also highlight Owen's journey to unravel the truth surrounding Cass Elliot's untimely death - finally laying to rest the long-standing urban legend of how she tragically died at the age of 32." (The urban legend was that Cass died at the age of 32 from choking on a sandwich.) Gunning, who is represented by UTA and the U.K.'s Markham Froggatt & Irwin, has upcoming projects that include Steven Soderbergh movie The Christophers, Marc Forster's Anxious People and the upcoming fantasy film The Magic Faraway Tree. Her role THR Newsletters Sign up for THR news straight to your inbox every day Subscribe Sign Up Varsity Blues James Van Der Beek's "I Don't Want Your Life!" Scene in 'Varsity Blues' Was All of Us in 1999 united kingdom The Best Six Weeks of Bella Ramsey's Life: How 'Sunny Dancer' Gave Them the "Teenage Years I Never Got" international Michelle Yeoh Tearfully Accepts Berlin's Golden Bear From Sean Baker as Fest Opens With 'No Good Men' Premiere international Next Narrative Africa Fund Reveals Industry Advisors to Oversee $50M in Content Spending (Exclusive) Watermelon Pictures "We'll Put Out the Films That Others Won't": Inside Watermelon Pictures' Fearless Bet on Political Cinema Berlin Film Festival Reviews 'No Good Men' Review: Patriarchy Makes an Easy Target Even if Nuance Is Mostly Elusive in Underwhelming Berlin Opener Varsity Blues James Van Der Beek's "I Don't Want Your Life!" Scene in 'Varsity Blues' Was All of Us in 1999 united kingdom The Best Six Weeks of Bella Ramsey's Life: How 'Sunny Dancer' Gave Them the "Teenage Years I Never Got" international Michelle Yeoh Tearfully Accepts Berlin's Golden Bear From Sean Baker as Fest Opens With 'No Good Men' Premiere international Next Narrative Africa Fund Reveals Industry Advisors to Oversee $50M in Content Spending (Exclusive) Watermelon Pictures "We'll Put Out the Films That Others Won't": Inside Watermelon Pictures' Fearless Bet on Political Cinema Berlin Film Festival Reviews 'No Good Men' Review: Patriarchy Makes an Easy Target Even if Nuance Is Mostly Elusive in Underwhelming Berlin Opener