'True Blood' and 'X-Men' star Anna Paquin has announced that she is bisexual in a new public service advertisement in the US.

Paquin is promoting the Give a Damn campaign in the ad.

Give a Damn calls for equality for members of the lesbian, gay, bisexual and transgender communities.

People magazine reports that Paquin, who is engaged to her 'True Blood' co-star Stephen Moyer, recorded the advertisement in Los Angeles in January.