*Lenny Kravitz and Sean “Diddy” Combs are among the guest stars lined up for an upcoming episode of the HBO comedy “Entourage,” reports EW.com. 

Kravitz will play himself—with Ari Gold (Jeremy Piven) serving as his agent. In the episode, “Ari’s trying to trade favors,” says series creator Doug Ellin. “He’s got to get Lenny to do a movie so someone else will do something for him.” 

Meanwhile, Diddy and “Entourage” executive producer Mark Wahlberg will portray themselves on the golf course. “Turtle [Jerry Ferrara] is starting a business, and he’s trying to get them to invest in it,” says Ellin. “He’s going to a lot of people about this investment.” 

The episode will air in August as part of the show’s seventh season, which debuts June 27.