'My Best Friend's Wedding' Star Is RIPPED!

8/22/2011 9:45 AM PDT

'My Best Friend's Wedding' Star -- Ripped!

It's been 14 years since "My Best Friend's Wedding," but Dermot Mulroney proved he's still got the bod of a newlywed by going on a shirtless run and showing off his buff chest and abs in Santa Monica this weekend.

Unfortunately, the fit 47-year-old is married in real life too.