It's David Letterman's comedy world

UPDATED: One person present Thursday at the Ed Sullivan Theater in New York City tells THR there was a "mix of excitement" and sadness following Letterman's news, while another audience member asked if "we can change your mind about retiring." 

LOS ANGELES – David Letterman, 66, rattled the entertainment industry on Thursday when it was revealed that after more than 32 years and almost 6,000 episodes in the late-night arena, he will retire in 2015 when his CBS contract expires. According to a 

Shortly after iconic CBS late-night host David Letterman announced his plan to retire in 2015, Twitter reaction began to pour in from a wide-range of celebrities — and even President Obama — reflecting on the comedian's 

Less than two months after his longtime rival Jay Leno stepped down from NBC's "Tonight Show," David Letterman has announced he'll retire and step down from CBS's "Late Show" in 2015. Letterman addressed the "Late Show" audience at Thursday's 

Tonight, two former R.E.M. members, Mike Mills and Peter Buck, will be on the Late Show With David Letterman. They're backing up the night's musical guest, singer-songwriter Joseph Arthur. Letterman tapes his show early