United Kingdom, April 18 -- Ben Affleck has quipped that his childhood pal Matt Damon is "upstaging him" with his rock-solid abs.

Topless pictures of the 54-year-old Hollywood star on the set of Christopher Nolan's new movie 'The Odyssey' were recently released with Affleck's 'Good Will Hunting' co-star showing off his eye-popping body transformation.

And while the 'Gone Girl' star admits he has huge "respect" for his friend because it's not easy building muscle like that at their age, he joked that he doesn't like him looking better than him.

He joked with 'Access Hollywood' at Thursday's (17.04.25) premiere of his new movie 'The Accountant 2': "You see, this is the face that's like, they just told him that there were photographers ou...