The former 'Tonight Show' host believed this celebrity was his worst guest of all time.

Like every comedian who's taken over The Tonight Show, Jay Leno left his own indelible imprint on the long-running TV series throughout his tenure as host. Overseeing production of the iconic NBC ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. One of the names allegedly on the list was fellow late night host Leno, who made his Tonight Show ...

Add Yahoo as a preferred source to see more of our stories on Google. Like every comedian who's taken over The Tonight Show, Jay Leno left his own indelible imprint on the long-running TV series ...