David Letterman is clearly enjoying his retirement.

The former Late Show host was photographed going for a run on the Caribbean island of St. Barts this week. He hasn't shaved his beard since he went off the air last May, but he shaved his head almost completely bald. He looks like an entirely different person. The only way to tell it's him is the Ball State alumnus' t-shirt.

Check him out:

Then and now:

See more photos at the Daily Mail.