Complete cast breakdown of Oh. What. Fun.: Who plays whom & where you’ve seen them before

The holiday season arrived with extra sparkle this year thanks to Amazon MGM Studios’ Christmas comedy Oh. What. Fun., which debuted on December 3, 2025, exclusively on Prime Video. Blending heartfelt family chaos with director Michael Showalter’s warm comedic touch, the film offers a fresh spin on the holiday-burnout story. 

Adapted from Chandler Baker’s Amazon Original short story, the movie follows Claire Clauster, the family matriarch who has spent decades making every December perfect, until the year she decides she’s finally had enough. When her loved ones accidentally leave her behind, Claire seizes the chance to step away from endless lists, ribbons, and cookies to rediscover herself. As her bewildered family scrambles to track her down, Oh. What. Fun. highlights the often-invisible emotional labor of the season, packaged with humor and heartfelt moments. 

Cast details for Oh. What. Fun.

• Michelle Pfeiffer as Claire Clauster: Pfeiffer appears as Claire Clauster in Oh. What. Fun., a fiercely devoted mother whose annual holiday workload pushes her past her limit. Claire has long been the engine powering the Clauster family’s elaborate Christmas traditions, yet rarely receives recognition for her efforts. Pfeiffer has previously appeared in films such as Dangerous Liaisons, The Fabulous Baker Boys, Love Field, French Exit, and Ant-Man and the Wasp: Quantumania.
• Felicity Jones as Channing Clauster: Jones appears as Channing Clauster, Claire’s oldest daughter, who often overlooks how much her mother shoulders during the holidays. As the family scrambles to find Claire, Channing is forced to confront her disconnect and rethink her assumptions. The Oscar-nominated Jones appeared in several films throughout her career, including Like Crazy, The Theory of Everything, The Brutalist, and Rogue One: A Star Wars Story.
• Jason Schwartzman as Doug Austin: Schwartzman appears as Doug Austin, Channing’s husband, whose understated humor becomes part of the film’s comedic rhythm as the family searches for Claire. Schwartzman is a frequent collaborator with Wes Anderson and has appeared in several of his films, including Rushmore, Moonrise Kingdom, The Grand Budapest Hotel, and Asteroid City. He has also appeared in TV series such as Fargo Season 4, and more recently Talamasca: The Secret Order.
• Eva Longoria as Zazzy Tims: Longoria appears as Zazzy Tims, the vibrant TV host who becomes unexpectedly intertwined with Claire’s solo adventure. Longoria has appeared in projects such as Desperate Housewives, The Sentinel, Only Murders in the Building, and Overboard. She continues to expand her career as an actor, director, and producer.
• Chloë Grace Moretz as Taylor Clauster: Moretz appears as Taylor Clauster, Claire’s younger daughter, who brings a modern and independent perspective to the family dynamic. Taylor’s evolving understanding of her mother adds emotional texture to the story. Chloe has appeared in films such as The Equalizer, Kick-Ass, Let Me In, Hugo, Carrie, The Miseducation of Cameron Post, Dark Shadows, and Tom & Jerry.
• Denis Leary as Nick Clauster: In Oh. What. Fun., Leary appears as Nick Clauster, Claire’s husband, who loves his family but has long underestimated the scope of Claire’s holiday responsibilities. Leary is known for his roles in Rescue Me, Demolition Man, Judgment Night, Wag the Dog, and The Amazing Spider-Man.
  Dominic Sessa as Sammy Clauster: Sessa appears as Sammy Clauster, Claire’s youngest son, whose concern during her absence highlights how integral she is to the family’s rhythm. Sammy adds youthful sincerity to the film’s emotional stakes. Sessa, who made an impressive debut in The Holdovers, continues to rise with roles in projects like Now You See Me: Now You Don’t.
• Danielle Brooks as Morgan: Brooks appears as Morgan, a supportive and grounded presence who offers clarity amid the Clauster family’s growing panic. Morgan helps reflect just how overwhelming Claire’s responsibilities had become. Brooks rose to prominence for her role in Orange Is the New Black. She has also appeared in projects such as The Color Purple, Peacemaker, Mahalia, and Master of None.

The supporting ensemble adds charm and comedic momentum to the film’s large family tapestry. Joan Chen appears as Jeanne Wang-Wasserman, joined by Devery Jacobs as Donna, Havana Rose Liu as Lizzie, Maude Apatow as Mae-bell, and Rose Abdoo as Jane. The extended families and interconnected characters are rounded out by Kurt Braunohler, Saidah Ekulona, Rafaella Karnaby, Drake Shehan, Douglas S. Jones, Michael Lee Kimel, Elizabeth Lilyan Wood, Zac Oyama, Audrey Hui, and Tanya Lim. Their performances help build the chaotic yet heartfelt world Claire steps away from, and eventually gets back into.

The comedy film Oh. What. Fun. was directed by Michael Showalter, who co-wrote the script with Chandler Baker. Producers include Showalter and Jordana Mollick of Semi-Formal Productions, Berry Welsh and Jane Rosenthal for Tribeca Productions, and Kate Churchill. The film features work from cinematographer Jim Frohna, composer Siddhartha Khosla.

Oh. What. Fun. is now streaming on Prime Video.