Monday will mark the start of David Letterman's final six weeks as host of The Late Show, with guests including Masters champion Jordan Spieth, Billy Crystal, Kevin James, Alec Baldwin, Michael J. Fox, Iron & Wine with Ben Bridwell, Tracy Chapman, and John Mayer.

In the days leading up to Letterman's May 20 farewell, CBS has confirmed a number of major celebrities and musicians will be stopping by, including Oprah Winfrey, Bill Murray, George Clooney, Julia Roberts, Steve Martin, Jerry Seinfeld, Will Ferrell, Tina Fey, Robert Downey Jr., Tom Hanks, Sarah Jessica Parker, Scarlett Johansson, Jack Hanna, Michael Keaton, Don Rickles, Ray Romano, Paul Rudd, Martin Short, Howard Stern, John Travolta and Bruce Willis, among many more.

Musical guests for the final episodes will be led by The Avett Brothers, Brandi Carlile, Elvis Costello, Dave Matthews Band, Emmylou Harris, Norah Jones, Mumford and Sons, Ralph Stanley and Amos Lee.

Additional guests will be revealed in the coming weeks.