The biggest stars will visit David Letterman for a farewell chat as the longtime late night talk show host enters his final weeks as the host of Late Show.

This week, Letterman will welcome Sarah Jessica Parker, Billy Crystal, Michael J. Fox, Kevin James and Alec Baldwin.  Musical guests include Tracy Chapman, John Mayer and more.

For Letterman's final 28 shows, also expect to see George Clooney, Robert Downey Jr., Will Ferrell, Tina Fey, Tom Hanks, Scarlett Johansson, Michael Keaton, Steve Martin, Billy Murray, Bruce Willis and more.

Letterman, whose late night run on both NBC and CBS totals 33 years, will host his final Late Show May 20.

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