"True Blood" star Alexander Skarsgard recently turned up the heat in the South Pole by posing nude on a toilet for a funny photo-op.

Wearing sunglasses, pants pulled down past his knees, and a pair of winter boots, the blonde Swedish actor -- who is no stranger to nudity -- appears to be reading a script in the photo, which was posted on Twitter on Tuesday.

"#southpole -30C What are you reading Alex? The script for season 7 of #trueblood HBO : -) #alexanderskarsgard," reads the caption of the photo which was posted by Inge Solheim, Skarsgard's team guide on the Walking with the Wounded Challenge.

Skarsgard, Prince Harry and a group of wounded war veterans last month completed a 320-kilometre trek to the South Pole to raise money for charity as well as awareness about the sacrifices of military men and women.

The photo, which was taken for fun, according to Solheim, is similar to the nude scene at the end of last season's True Blood.