Mission Impossible III star Maggie Q has stripped off for a stunning new People for the Ethical Treatment of Animals campaign poster aimed at convincing New Year dieters to give up meat.

I mean, social, environmental, humanitarian - all of them

The vegan actress agreed to bare all and have her body painted like planet earth for the edgy new Peta billboard that reads, 'Fight Climate Change With Diet Change.

Go Veg'.

The poster debuted above the Sunset Strip in Los Angeles on Thursday (24Jan13) and will stay there for a month.

Maggie Q tells WENN, "There's so many issues tied to the meat industry. I mean, social, environmental, humanitarian - all of them. I know that when I'm eating that I'm not hurting the planet, I'm not hurting other people on this planet, I'm not hurting animals... and I'm not hurting nature".

The star is not the only celebrity backing Peta's meat-free campaign - Alicia Silverstone, Casey Affleck, Sir Paul McCartney, Joaquin Phoenix and Forest Whitaker have also teamed up with the animal rights group to promote vegetarian and vegan eating.