Matt Damon (left) and Adrian Grenier
Splash News Online; Kristen Noseda/INF
07/13/2009 AT 09:50 AM EDT
PEOPLE's 2007 Sexiest Man Alive Matt Damon
is no stranger to good exposure – or good deeds. "Matt came on the phone with me and wanted to do something that focused on his charity, OneXOne
, which helps kids all over the world," Doug Ellin, executive producer of Entourage
, tells TV Guide
. "It wasn't hard to get him."
As for Damon's Entourage
appearance, that's a secret that's not supposed to be spilled until the HBO's series' Oct. 4 sixth-season finale. Still, the cat may be out of the bag, thanks to loose lips on the show's cast members.
SPOILER ALERT: In the scene, set in an airport, "Matt gets Vince [Adrian Grenier] to make a massive donation. He's like, 'Bro – whip out your checkbook!' " reveals Emmanuelle Chriqui, who plays Sloan.
Adds Grenier: "The joke is that Matt is very passionate about his charity – almost in a stalkerish kind of way. Vince becomes [intimidated] by his intensity. He ends up bullying Vince into giving much more than he should."
– Stephen M. Silverman