Trevor in the Buff

Much-missed 90210 star Trevor Donovan has dropped trou for a sexy photo.

Don’t go looking for a Playgirl, though – this pic was taken at a friend’s house for no apparent reason other than to celebrate his hotness.

Lucky towel, huh.

Donovan will next be seen in Oliver Stone’s Savages this fall.

And he teases he could pop up to visit his ol’ Beverly Hills pal at some point down the line, telling Us Weekly his character Teddy’s story is not necessarily finished.

Photo: USMagazine.com.