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FILE - In this April 3, 2014 file photo provided by CBS, David Letterman, host of the “Late Show with David Letterman,” smiles after announcing his retirement during a taping in New York. Letterman will host his final show on May 20. (AP Photo/CBS, Jeffrey R. Staab) MANDATORY CREDIT, NO SALES, NO ARCHIVE, FOR NORTH AMERICAN USE ONLY Image Credit: AP

David Letterman is packing his final 28 shows as a late-night host with a who’s who of Hollywood names and favourites leading up to his May 20 swan song.

CBS announced on Monday that his guests will include Bill Murray, George Clooney, Steve Martin, Jerry Seinfeld, Robert Downey Jr., Will Ferrell, Tina Fey, Tom Hanks, Scarlett Johansson, Sarah Jessica Parker, Don Rickles, Julia Roberts, Ray Romano, Howard Stern, Oprah Winfrey, Martin Short, John Travolta, Michael J. Fox and Alec Baldwin.

And there will be others who haven’t been announced yet. Musical guests will include Elvis Costello, Dave Matthews Band, Mumford and Sons, Norah Jones, Amos Lee and Tracy Chapman.

Letterman hasn’t specified who, if anyone, will join him for his final show after 33 years on late-night TV.

Letterman’s replacement, Stephen Colbert, will take over from September 8.