Graham Norton is renowned for his talk show and has been interviewing big celebrities for a very long time.
The Graham Norton Show came to our screens in 2007 and has featured celebrities such as Tom Cruise, George Clooney, Meryl Streep, Dame Judie Dench, the list goes on.
He has now revealed his worst guests from over the years, as he spoke to an audience at Cheltenham Literature Festival.
Graham revealed Robert De Niro was a big disappointment, as he struggled to get anything of much interest our of the star.
"He's not a storyteller, or very verbal. He's a benign presence" Norton said.
He also revealed the cast of Ocean's 8 were difficult to handle.
"I felt like the guy driving the bus on a hen party"
He said the stars of the movie, Sandra Bullock, Rihanna, Cate Blanchett, Sarah Paulson and Helena Bonham Carter, all had a great time but they talked over each other, constantly laughing, which wasn't very enjoyable for the audience.