The Riverdale actor, 28, has signed on to star as the late Hollywood legend in the upcoming biopic Jimmy, Variety reports. Jason Alexander also stars as Louis B. Mayer, alongside Max Casella as Frank Capra, Sarah Drew as Hedda Hopper, Julian Works as Second Lieutenant Martinez and Jen Lilley as Gloria Rankin Stewart.

KJ Apa has signed on to star as James Stewart in “Jimmy,” an upcoming biopic about the “It’s a Wonderful Life” legend.

KJ Apa is making a giant leap from Riverdale to A Wonderful Life. The 28-year-old actor has been tapped to play famed actor James "Jimmy" Stewart in an upcoming biopic from director and producer Aaron Burns,