Brace yourself for this one - not sure if you can handle the cuteness. Our favorite Grey's Anatomy leading man was photographed carried his young son!

Patrick Dempsey was on daddy duty Sunday afternoon as he escorted son Darby, 19 months, and daughter Tallulah out and about in Santa Monica.

No word on where Darby's twin, Sullivan, was. But here's the photo ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.