Country stars Tim Mcgraw and Dwight Yoakam have joined the cast of Jon Favreau's new festive comedy FOUR CHRISTMASES. MCGraw will play a bullying brother to Favreau and his Swingers co-star Vince Vaughn, while Yoakam will play a pastor in the movie. Shooting has already started on the all-star project, which also features Reese Witherspoon, Mary Steenburgen, Sissy Spacek, Kristin Chenoweth and Robert Duvall.