An important part of a many teen girl bedrooms is the “god wall.” A collage of magazine photos, pictures of friends, and album art, the wall is a sort of manifestation of what’s inside that kid’s brain, from their favorite pop stars to their burning crushes. In the new movie How To Build A Girl, that wall features beloved personalities like Michael Sheen, Lily Allen, and The Great British Bake-Off’s Mel and Sue portraying everyone from Jane Austen to Jo March to Sigmund Freud. To cast the cameos, filmmaker Coky Giedroyc called in a few favors (GBBO’s Mel is actually her younger sister) and used screenwriter and author Caitlin Moran’s extensive contacts list. The A.V. Club talked to her about that process and more at last year’s Toronto International Film Festival, and you can watch that interview above.