Stephen Colbert, David Letterman
Stephen Colbert won't officially take over as host of The Late Show until next year, but he'll stop by as a guest next Tuesday, April 22.
CBS announced last week that Colbert will succeed David Letterman after he retires in 2015.
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This won't be Colbert's first time on the show. The Colbert Report host has made several appearances dating back to 2005.
Late Show with David Letterman airs at 11:35/10:35c on CBS. Will you watch Colbert's appearance?