London, Feb 20 : Pop star Pink is donning an alligator costume for a new charity advert.

The `So What!' hitmaker has been a vocal supporter of People for the Ethical Treatment of Animals (PETA), and appears in the campaign group''s forthcoming cinema promo as a reptile.

The singer will be joined by British comedian Ricky Gervais - who dresses up in an equally wacky costume for the cause, reports the Daily Star.

TV funnyman Gervais confirmed the news in a blog post on his official site.

He says of their involvement: "Did a cinema charity ad for PETA. It''s a great idea and I play a rabbit, and Pink plays an alligator.

"I''ll post it when it''s all finished and shiny."

Gervais is currently working on his next stand-up tour, ''Science''. (ANI)