Tiger Woods and Buick Enclave (© General Motors)

Celebrities get paid big bucks to sell stuff, but when it comes to cars, famous faces are few and far between. The last big-name celebrity to hawk a line of vehicles was probably Tiger Woods, for Buick — until that night he crashed his Cadillac Escalade, of course. But that doesn't mean automakers don't want their celebrity fix. In fact, A-list names are actively trying to sell us Dodge, Hyundai, Fiat and Nissan vehicles every time we turn on the TV — you just don't see their faces. Or in the case of some major A-list stars, their commercials are for foreign markets only, never to be aired in the United States. Here, we match the major celebrities to their respective automaker endorsements.

Bing: Celebrity Cars

Nissan

The polar bear may have been the breakout star of Nissan's first television commercial for its all-electric LEAF, but did you know that it's "Iron Man" who's selling you on the idea of environmental responsibility? Yep, Robert Downey Jr., star of everything from "Sherlock Holmes" to "Wonder Boys," "Natural Born Killers" and "Chaplin," has been voicing spots for Nissan's "Innovation" advertising campaign since 2010.

Watch the LEAF commerical

Read:  Driving 'Electric Avenue'

Hyundai

Gravelly voiced Jeff Bridges, the Dude himself, or El Duderino if you're not into the whole brevity thing, has been singing the praises of Hyundai's new products, including the Elantra, Sonata and Sonata Hybrid. Hyundai isn't the first ride for Bridges when it comes to voice work: The "True Grit" and "Tron: Legacy" actor previously hawked Duracell batteries and Ameriquest Mortgage products.

Compare: Hyundai Sonata vs. Ford Fusion vs. Honda Accord

Fiat

When you're considered one of the most handsome and charming leading men in the world, there's no need to make goofy commercials for comfortable and reasonably priced small cars; at least, not ones that will air in the U.S. George Clooney, however, has shilled for Fiat in Italy, where he has a palatial vacation home on Lake Como. Check out the "Oceans 13" and "Good Night and Good Luck" actor putting in some face time in this cheeky spot for the Fiat Idea.

Watch Clooney's Fiat Idea commercial

View Slideshow:  Affordable Fuel-Efficient New Cars

Alfa Romeo

Clooney isn't the only A-lister pushing Fiat products. "Kill Bill" and "Pulp Fiction" actress Uma Thurman — who frequently lends her likeness to fashion campaigns — appeared in front of the camera last year in a TV ad for the slick Alfa Romeo Giulietta, which ends with a Shakespeare quote, "We are such stuff as dreams are made on." Really?

Bing Images: Alfa Romeo Giulietta