The news comes via CNN's Brian Stelter:
It's true. David Letterman just announced he is retiring in 2015. More soon.
— Brian Stelter (@brianstelter) April 3, 2014
Letterman began his career at NBC, but had an ignominious breakup with the network after hosting duties of the "Tonight Show" were awarded to his rival Jay Leno.
His current program, the "Late Show with David Letterman," has aired on CBS since 1993.
Watch Letterman announce the retirement below:
This post has been updated.