Graham Norton -
'The Graham Norton Show' has had many A-listers as guests, but there is one that Norton found particularly boring.
Hugh Grant -
Grant took to Twitter afterwards to acknowledge that his behavior was out of line and said he agreed with Jon Stewart's decision to ban him from the show.
Johnny Carson -
The late TV host has had many high-profile guests over the years, but comedian Bob Hope seemed to be the worst.
Conan O'Brien -
'Late Night with Conan O'Brien' has had its fair share of peculiar guests, but according to the TV host, none as bad as director Abel Ferrara in 1996.
Lorraine Kelly -
With a career on TV spanning over 35 years, the Scottish TV host has met a few peculiar characters.
Kevin Spacey -
Topping the list is Kevin Spacey. "He was horrible. Just very arrogant. I didn't like him at all," confessed Kelly.
Harrison Ford -
Ford also makes Kelly's list of undesirable guests. "I don't think [Ford] particularly liked the movie that he was promoting, and he just wasn't really happy," the TV host said.
Larry King -
The late TV host confessed that Phyllis Gates, wife of the late actor, Rock Hudson, was his worst guest.
Jay Leno -
Over the years, Leno had many difficult guests as the host of 'The Tonight Show with Jay Leno.' But he has a special pet peeve: reality stars.
Chelsea Handler -
The host of 'Chelsea Lately' found that one of her guests was a huge pain to deal with.