Actor John Barrowman bares some in his latest photo for the NOH8 Campaign.

The NOH8 Campaign raises awareness and funds for gay rights causes. It started as a protest against passage of Proposition 8, California's now-repealed constitutional amendment which excluded gay and lesbian couples from marriage.

Barrowman, who is best known for playing Captain Jack Harkness on the BBC science fiction series Doctor Who and Torchwood, married his husband Scott Gill after Proposition 8 was struck down.

(Related: John Barrowman gets going when asked about his marriage.)

The NOH8 Campaign's Adam Bouska and his partner Jeff Parshley photograph celebrities, politicians, professional athletes and everyday folks with their mouths duct taped and the campaign's familiar “NOH8” slogan often written on one cheek.

Barrowman's photo includes NOH8 tattoos on two cheeks, one of which rests below his waist.

Celebrities who have recently joined the NOH8 Campaign include Liza Minnelli, actors Josh Hutcherson and Avan Jogia, Nate Ruess, Jack Antonoff and Andrew Dost of the band fun, Glee's Alex Newell, singer Ricky Martin, actress Lana Parrilla, actor LeVar Burton, Minnesota Vikings punter Chris Kluwe, singer LeAnn Rimes, actor Taye Diggs, actor James Van Der Beek, actress Aisha Tyler, Glee's Nene Leakes, singer Miley Cyrus, Hot in Cleveland's Valerie Bertinelli, Wendie Malick and Jane Leeves, singer Courtney Love and Meghan and Cindy McCain.