Many A-list (well, and B and C-list) celebrities shill for products behind the scenes without recognition. Why? Like most things in Hollywood, it’s all about the Benjamins.

Appearing on-camera for a commercial is more of an ordeal for an actor … hair, makeup, wardrobe, and often multiple re-takes. A 60-second spot can take up to 12 hours to shoot. The sponsor not only has to pay the celeb’s outrageous salary, they also have to pay union wages for the on-set crew. An off-camera voiceover, on the other hand, only requires that the star read his lines vocally at a studio. No special makeup or lighting required. The spot can be knocked off in a few hours, and the star can still accrue megabucks, since the sponsor is saving all that money.

In case you haven’t recognized some of the latest celebrity shills in recent years, here’s a quick breakdown:

• Antonio Banderas – Nasonex allergy medication
• Queen Latifah – Pizza Hut
• Kelsey Grammer – Disney World
• Christian Slater – Panasonic
• Julia Roberts – America Online
• Gene Hackman – Lowes