Jason Schwartzman, Eva Longoria, Maude Apatow and Danielle Brooks

Paul Archuleta; Jenny Gage + Tom Betterton; Elias Tahan; Ira Black

Amazon MGM Studios has rounded out the cast of Oh. What. Fun., its all-star holiday comedy being directed by Michael Showalter, who is coming off the record-breaking success of the streamer’s romantic drama The Idea of You.

Jason Schwartzman, Eva Longoria, Joan Chen, Devery Jacobs, Havana Rose Liu and Maude Apatow have been added to the call sheet while Danielle Brooks has signed on for a cameo in the feature, which is currently shooting in Atlanta.

Michelle Pfeiffer is leading the ensemble that already include Felicity Jones, Chloë Grace Moretz, Denis Leary and The Holdovers breakout Dominic Sessa.

Described as both a love letter to moms and tonally a cross between Home for the Holidays and Planes, Trains and Automobiles, the story centers on a woman named Claire Clauster (Pfeiffer) who organizes a special Christmas outing, but her family forgets her in the shuffle. By the time they realize their mistake, she’s gone missing and their Christmas is in jeopardy. Luckily, nothing will stop Claire from giving her family the holiday they deserve.

Pfeiffer is playing Claire with Leary her husband. Jones, Moretz and Sessa are said to be playing the woman’s grown children.

Details for the roles of the new crop of actors were not revealed.

The script is based on Chandler Baker’s short story, published by Amazon Original Stories. Showalter and Baker wrote the script for the feature. Showalter is also producing the film via Semi-Formal Productions alongside Jordana Mollick, Tribeca’s Berry Welsh and Jane Rosenthal and Kate Churchill.

The moviemaker’s Idea of You attracted nearly 50 million worldwide viewers in its first two weeks on Prime Video, becoming Amazon MGM Studios’ No. 1 romantic-comedy debut of all time.

Oh. What. Fun. doesn’t have a release date will be available to stream on Prime Video in more than 240 countries and territories worldwide.

Schwartzman was last seen in The Hunger Games: The Ballad of Songbirds and Snakes as well as in the recent season of Fargo. He is part of the cast of Francis Ford Coppola’s Megalopolis, which premiered in Cannes a week ago. He is repped by UTA, Ocean Avenue Entertainment and Sloane Offer.

Longoria, who became a star thanks to her starring role in Desperate Housewives, made her feature directorial debut with Flamin’ Hot. She will next be seen in Land of Women for Apple TV+ and in the upcoming fourth season of Only Murders in the Building for Hulu. The actress, who is returning to CNN with an original series titled Eva Longoria: Searching for Spain, is repped by WME, Linden Entertainment and Yorn Levine.

Chen is coming off of a turn in Hulu’s murder mystery show Murder at the End of the World and is repped by Inphenate and Goodman Genow.

Jacobs is one of the stars of Hulu’s acclaimed Reservation Dogs and was nominated for back-to-back Critics Choice Awards for her work on the show. She appeared on Marvel’s crime series Echo earlier this year and voiced the character “Kahhori” in Marvel’s animated series What If…?. She is repped by CAA, Entertainment 360 and Sloane Offer.

Liu was one of the stars of coming-of-age lesbian comedy Bottoms and is currently filming John Carney’s feature film Power Ballad, opposite Paul Rudd and Nick Jonas. Liu is repped by CAA, Anonymous Content and Schreck Rose.

Apatow, one of the stars of Euphoria, recently made her professional stage debut in the off-Broadway production of Little Shop of Horrors. She is repped by UTA, Mosaic and Ziffren Brittenham

Brooks starred in the film of the adaptation of the Broadway musical The Color Purple, reprising her Tony-nominated role of ‘Sofia’ that she originally played on stage. The film earned her Academy Award, Golden Globe, Screen Actors Guild, BAFTA and Critics Choice Award nominations.  She is repped by CAA, Door 24 and attorney Erik Hyman.