David Letterman announced his retirement during the taping of tonight's (Thursday's) episode of The Late Show.

His last show is expected to come when his contract with CBS is up next year.

In a statement, Dave says the first person he informed was CBS head honcho Les Moonves. "I phoned him just before the program, and I said 'Leslie, it's been great, you've been great, and the network has been great, but I'm retiring.'"

By then, he will have hosted the Late Show for 22 years. He did Late Night for another 11 years on NBC. This follows on the heels of his rival Jay Leno leaving the Tonight Show earlier this year. No word on who will replace Dave, but Late, Late Show host Craig Ferguson would seem a top contender.

Dave turns 67 on April 12th.

SOURCE: Variety