Demi Moore gave up the couch on the 'Late Show' (weeknights, 11:35PM ET on CBS) for David Letterman's lap -- all in the name of converting him to the Twitter religion.

Watch the video after the jump. Demi Moore gave up the couch on the 'Late Show' (weeknights, 11:35PM ET on CBS) for David Letterman's lap -- all in the name of converting him to the Twitter religion.

"I could help you do a Twit-pic, because I think that might help you like Twitter a little bit more," said the actress. "I'm going to sit on your lap because we need to be close."

That part he liked: "Send that [picture] to Ashton [Kutcher], see if he's still going to the airport," said Letterman after Moore posed with her arm around him. But, sorry Demi. Looks as though he still wasn't sold on Tweeting.