The 90210 star marches on for a day of shooting on the show's L.A. lot. Plus: Nicole & Joel, Jennifer Aniston, the cast of Entourage and more

FAB FOUR

The Entourage crew – (from left) Jerry Ferrara, Kevin Dillon, Kevin Connolly and Adrian Grenier – suit up for their big premiere night, debuting season 5 of their HBO show (which premieres Sept. 7) at New York's Ziegfeld Theater on Wednesday.