Jeremy Irons: Gimme Some Volcanic Mud ... IN THE FACE!!

Since you're not Oscar winner Jeremy Irons, you probably get mud mask treatments at a boring spa -- but he has a dude in a Speedo apply his ... while sitting in Italian volcanic ash. Baller!

Irons and his wife, Sinead Cusack, caught a boat ride to Ischia -- a volcanic island off Naples, known for its natural hot springs. While the couple soaked, Irons got the mud literally painted on his face.