VIDEO : 'Late Show': Stephen Colbert Announces George Clooney as First Guest

Stephen Colbert is kicking off his CBS late-night show in a big way. The host tweeted Friday that George Clooney will be his first guest on the Late Show when it debuts Sept. 8. Colbert is taking the show's reins from David Letterman, whose final episode aired May 20. The news comes one day after Jon Stewart signed off as host of the Daily Show, where Colbert was a regular before landing his own Comedy Central series, The Colbert Report.