Mark Wahlberg and Rhea Durham held hands as they left lunch at LA's Il Pastaio on Thursday. They were then off to the Westfield Center to shop with their young son Brandon. The Wahlberg family is prepping for a big birthday celebration this weekend, since Mark turns 40 on Sunday! He's home to mark the milestone with his wife and kids after spending the past few weeks in Boston with Mila Kunis on the set of their dark comedy Ted. Mila's the latest on Mark's long list of A-list costars, and his next partner may be a surprising one — he's apparently teaming up with Justin Bieber for an untitled basketball drama. Happy early birthday Mark!