In more than 15 years of The Graham Norton Show the iconic presenter has welcomed hundreds of guests, but only one of them holds the title for the 'worst ever'.
It's not exactly an award that celebrities are clamouring to get their hands on, but it's got to go to someone.
Norton's answer for the 'worst person' he's ever spoken to on the show will have changed as he interviewed more and more people over the years, and he previously made a controversial choice when announcing his worst guest.
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Initially, Norton claimed Robert De Niro was a somewhat ‘benign’ presence on the show, failing to entertain Norton in the same way that he might win fans watching one of his movies.
"Last time he started telling a story – he went on and on," Norton explained at the Cheltenham Literature Festival a few years ago,
"We were all leaning in, willing it to be amazing... then he finally went, ‘why am I telling this?’ Nobody had an answer. We cut it."
The winner of 'worst guest' changed last year, though, when the chat show host came up with a new answer when speaking about the topic at an event in Dublin to celebrate the launch of his novel, Forever Home.
The presenter was reportedly asked at the event about the worst guest he’d ever had on the show, prompting him to name a certain disgraced movie mogul.
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His choice wasn't solely based on the fact he’s now in prison after being sentenced to 23 years for rape and sexual assault, though that probably had a part to play.
Norton explained: "I often talk around who my least favourite guest was, but now, someone reminded me, I have a really good answer to this now. It's Harvey Weinstein. He's in jail, so he gets the prize for the worst guest ever."
Norton described how Weinstein emailed Norton saying he wanted to be on the chat show, but it was already fully booked.
"He e-mailed back: 'What if I blah de blah de blah'. [I replied] 'No, the show is fully booked, blah de blah'," Norton continued.
"And he e-mailed back again, 'But I think...', and I just had to turn to my booker and say 'Can you please deal with this?' And at the time, I thought that sort of attitude, that kind of 'Oh no, I'm going on [the show]', that is what makes you a very good producer.
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"But of course, now that we know what we know, that is what makes him a predator. It was that kind of weird, tunnel-vision thing. And it was sort of chilling in retrospect, because I was just laughing at those emails. But you realise 'Oh my God, that is an insight into how that man is'."
Weinstein appeared on The Graham Norton Show in 2015, when he was joined by David Tennant, Olivia Colman and Jessie J.
The host's encounter with Weinstein bumped De Niro off the 'worst guest' pedestal, which makes sense, considering all De Niro had done was tell a boring story.
Featured Image Credit: David M. Benett/Dave Benett/WireImage/BBCTopics: Graham Norton, BBC, TV and Film, Celebrity