NBC asked Paar to succeed Steve Allen as host of The Tonight Show. He hosted
the talk show from July 29,  1957 to March 30, 1962. At first, the show was called
Tonight starring Jack Paar; after 1959 it was officially known as The Jack Paar
Show. During its run it was broadcast from Studio 6B (formerly known as the
Texaco Star Theatre) inside the RCA Building, the same studio that later
hosted early episodes of The Tonight Show Starring Johnny Carson. In
1957 and 1958, The Jack Paar Tonight Show was awarded the Primetime
Emmy Award for Outstanding Variety, Music or Comedy Series.

Paar’s original announcer was actor Franklin Pangborn (above clip),
but he was fired after only a few weeks for not showing enough
“spontaneous enthusiasm”. His replacement was Hugh Downs who
remained with the show until the end.

Hugh Downs (left) co-hosting with Jack Parr