Entourage actor Kevin Connolly has risked embarrassing Adrian Grenier by revealing his co-star stuffed his pants to appear well-endowed for a recent photoshoot.

With their TV co-star Jerry Ferrara, Connolly and Grenier were among People magazine's hottest bachelors of 2009 and posed for the June feature as disco trio the Bee Gees.

And Connolly has finally outed his pal for padding his underwear before slipping into their skintight costumes - after weeks of keeping tight-lipped about the fake bulge.

He says, "Adrian put a sock (in his pants). I was like, 'What are you doing?' He was like, 'This is what they did in the 70s.' The photographer was actually like, 'Adrian, we've got to lose one of the socks.' I never gave it another thought, and then girlfriends of mine started calling me... I didn't want to throw him under the bus (betray him)."