Here’s a very ironic “Before They Were Stars” feature that wound going full circle for the actor. Adrian Grenier is best known for his lead role in Entourage as a big movie star who constantly has an entourage following him around. Well, one of Grenier’s earliest roles was in the Woody Allen film, Celebrity, where he’s credited as “Darrow Entourage”. That’s right, the star of Entourage started out by being in the entourage for Leonard DiCaprio’s character, Brandon Darrow. You can see him walking around in the background of the scene inside the casino, which, of course, is exactly what entourages do.