LONDON — Martin Freeman will star in “Nativity,” a semi-improvised Brit comedy from writer/director Debbie Isitt.

Freeman, who came to the fore in original “The Office” TV series before toplining in feature “The Hitchhiker’s Guide to the Galaxy,” reteams with Coventry-based Isitt after the two collaborated on “Confetti” (2006).

Ashley Jensen (“Ugly Betty,” “Extras”), Jason Watkins and Marc Wootton also star in the pic about two rival English schools vying to outdo each other in the annual Christmas nativity play.

Pic is backed by BBC Films, Screen West Midlands and Limelight.

Nick Jones (“Confetti”) produces with Joe Oppenheimer and David M. Thompson exec producing for BBC Films.

Protagonist Pictures is handling intl. sales.