Jack Paar was the host of the 'Tonight Show' from 1957 to 1962. He was known for his wit and humor, as well as his ability to make his guests feel comfortable. He was the first to introduce the concept of the celebrity guest interview, which has become a staple of late night television. He was also the first to introduce the concept of the monologue, which is still used today. Jack Paar was the 'Jack of the Old 'Tonight Show'' for five years.