Matt Damon and his wife Luciana renewed their wedding vows on the Caribbean island of St. Lucia on Saturday.   The couple exchanged vows at sunset in front of 50 guests that included their four daughters, actor Ben Affleck and his wife Jennifer Garner, as well as his Ocean's co-stars Casey Affleck and Don Cheadle.   Damon reportedly spend almost $1 Million to rent out the entire Sugar Beach resort to accommodate his family and guests.   Damon met his wife at a bar in Miami is 2003 while he was shooting the film Stuck On You and she was tending bar.