According to Deadline, Vince Vaughn has joined the cast of Fighting With My Family, a wrestling-based dramedy film produced by and starring Dwayne Johnson. The movie is based on the life of WWE star Paige, and will feature Lena Headey and Nick Frost in addition to Vaughn and Johnson. Plus, the film is being written and directed by Stephen Merchant from The Office, so there are a lot of interesting and mildly incongruous pieces at work here.