Actress-model Kelly Brook has posed naked in the trailer for new US sitcom `One Big Happy`.

Produced by popular TV show host Ellen DeGeneres, the show will go on air in March this year.

Brook plays Prudence who gets married to Luke (essayed by Nick Zano) before finding out he's got her lesbian roommate pregnant.

In the trailer, the 35-year-old stands bare with her hands behind her back, reports mirror.co.uk.

`How would I do on the lesbian market? I don't think I've ever been appraised,` she says.

Apart from Zano and Brook, the sitcom stars Elisha Cuthbert, Brooke Lyons and Misan Akuya.