David Letterman to retire in 2015

This isn’t an April Fool’s joke.

CNN’s Brian Stelter is reporting that “Late Show” host David Letterman will retire in 2015 .

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Letterman reportedly made the announcement while recording tonight’s episode in New York this afternoon, according to Hypable.com.

“CBS Evening News” anchor Jeff Glor says the program will have more details tonight.

Twitter is already buzzing with fan and friend reaction, like that of fellow late-night host, Jimmy Kimmel (below). Check out more reaction in our round-up.

Letterman has hosted the CBS talk show since 1993. We’re waiting for official confirmation from. We’ll keep you updated.