New Regency and Walden Media are partnering to develop, finance and produce the musical family film “Santa Is Real.”

Stephen Chbosky (“The Perks of Being a Wallflower”) is set to direct and Larry Stuckey (“Little Fockers”) will write. Stacey Sher and Alexandra Milchan are producing with Walden Media.

The movie is based on the upcoming book “Santa Claus Is For Real: A True Christmas Fable About the Magic of Believing” by Charles E. Hall and Bret Witter.

Random House is publishing the book on Oct. 14.

The film tells the story of Charles Hall, who was a struggling actor when he began playing Santa in Radio City’s Christmas Spectacular. He’s been in the role for the past 27 years.

Walden Media’s Naia Cucukov will oversee the project on behalf of Walden.

New Regency is in production on Alejandro Gonzalez Inarritu’s “The Revenant” starring Leonardo DiCaprio and Tom Hardy and set for release on Christmas Day 2015. It produced Fox’s “Gone Girl” and Fox Searchlight’s “Birdman,” directed by Inarritu and opening Oct. 17.

Walden released “The Giver” and is post-production on Universal’s  adventure/thriller “Everest” starring Jake Gyllenhaal, Josh Brolin, Jason Clarke, Keira Knightley, John Hawkes, Sam Worthington, Emily Watson and Robin Wright.

Chobsky is represented by WME and Ken Richman from Hansen Firm.