CBS late night host David Letterman announced that he's retiring in 2015.

The late night funnyman is retiring after more than two decades as host of CBS' "Late Show With David Letterman."

Letterman, who turns 66 later this month, made the announcement during a taping of his show that's scheduled to air tonight. The Late Show with David Letterman has been on CBS since 1992.

He said he called CBS Chairman Leslie Moonves before going on and told him the time was right for him to hang it up.

Next year will mark Letterman's 22nd year of hosting "The Late Show."  

Letterman quipped during his announcement that the end of the show means that he and "Late Show" band leader Paul Shaffer could now get married. 

Citing his time hosting late night television between his eleven years at NBC's "Late Night" and his run on CBS, Letterman said it amounted to 34 years and almost six-thousand shows.   

Letterman's planned exit is the latest in a recent shuffling of the late night landscape that also saw the departure of his longtime "Tonight Show" rival Jay Leno from NBC earlier this year. 

Hear Letterman's announcement here: