Jimmie Walker - himself; in one episode he becomes the new host of "Night Stand Lite!"

The original top billed star Ralph Cooper was host of Amateur Night at the Apollo Theatre for 50 years.

O'Brien was picked as the new host of Late Night on April 26, 1993.

He is the host of Late Night with Jimmy Fallon.

We asked Ralph Cooper, host of Amateur Night since it began in 1935, how much Eva mattered.

Not David Letterman, host of "Late Night With David Letterman," nor his writers.

Letterman was replaced by newcomer Conan O'Brien as host of Late Night.

The writers decided to include him in the episode after he received an audition to replace David Letterman as the host of Late Night.

During the production of the episode, he received an audition to replace David Letterman as the host of Late Night.

That moment, stepping out onto the studio stage as host of "Late Night" in September 1993, happened only because of Mr. O'Brien's dreams.