Alicia Silverstone posed nude for a new billboard for PETA that is being displayed in Portland, Ore.

Located on N.W. 21st Avenue and W. Burnside Street in Portland, the ad features the actress showing off her bare backside while holding a plastic sheep's mask.

"I'd rather go naked than wear wool," the tagline reads in support of PETA's #WoolFreeWinter campaign.

PETA, whose motto is that animals "are not ours to wear," have sought to expose the wool industry due to the abuse suffered by sheep.

Silverstone appeared in a similar ad in November 2016 where she discussed her reasoning for getting involved with PETA in their fight against the use of wool.

"It's just so fast, the shearing process," the Clueless alum said at the time.

"[The sheep are] cut. They're harmed. They get very seriously wounded, and there's no care for them when they're wounded. It's just, 'Move on to the next.'"

"Why not make that leap?" she continued. "Say, 'I'm never going to buy wool again.'"