Paul Giamatti will star as Santa Claus in the new untitled Warner Brothers holiday comedy; Vince Vaughn plays his black-sheep brother, Fred.

According to Variety, the story, originally named Fred Claus, is based on the story by producer Jessie Nelson (I Am Sam), and is about Santa going home to the North Pole and reuniting with his long, lost sibling.

The film is another reunion of Vince Vaughn with Wedding Crashers director David Dobkin. The two came together after David took himself off the Adam Sandler/Kevin James comedy, I Now Pronounce You Chuck and Larry.

The Warner film, written by Dan Fogelman, will start production soon; it's scheduled to hit theaters next year.