LONDON — “Harry Potter” star Michael Gambon has joined the cast of comedy “The Baker,” which is the feature debut for writer-director Gareth Lewis.

Gareth’s brother, Damian Lewis (“Stormbreaker”) plays Milo in the pic, about a hit man who flees his overlords when he can’t go through with a whack. Milo hides out in a remote Welsh village and works as a baker. He soon falls for local vet (Kate Ashfield) but cannot escape his past.

The Grandville Pictures and Picture Farm production begins principal photography in south Wales for six weeks on March 27. Damian Lewis produces alongside Adrian Sturges, Justin Williams and Dan Shepherd.

Speaking of the collaboration with his helming bro, Damian said, “It’s a great feeling to be working with him as one of his producers. I am just getting my head around being bossed about by him as one of his actors.”