Sean 'P Diddy' Combs and Lenny Kravitz are the latest stars to sign up for cameo roles as themselves in the comedy series 'Entourage'. reports that Combs will play a potential investor in Turtle's (Jerry Ferrara) new business.

Kravitz will play a client whom Ari Gold (Jeremy Piven) is urging to star in a film.

The episodes will air on American television in August.

The castings were first reported by Entertainment Weekly.