Man Overboard!

1/3/2008 1:34 PM PST BY TMZ STAFF
It's 41-year-old former hunk Billy Zane! Uncle Fester, is that you?!

Zane, who donned a wig to play Cal Hockley in the 1997 blockbuster, was snapped swimming with someone's butt off the coast of St. Bart's. Thar she blows!

While his heart may go on, Zane's sexiness has hit an iceberg!