Can you guess who the man on the left is?

What do you do when you’re a retired late night TV host? If you’re David Letterman you go to New Orleans  to help build a house for Habitat for Humanity.

A local volunteer has shared a selfie of herself and a heavily bearded Letterman in front of the construction site.

Letterman retired in May after nearly 25 years as host of CBS-TV’s “Late Show”. Word has it he likes to help out with projects like this … but keeps it on the down-low.