The Graham Norton Show

Julianne Moore says working with Natalie Portman was so much fun, Paapa Essiedu talks about Melissa McCarthy's elite improvisation, Jamie Oliver says renewing his vows was so romantic, Ricky Gervais talks about Armageddon, and Olivia Dean performs live in the studio.

Julianne Moore, talking about starring in the critically acclaimed May December and working with Natalie Portman, says, "We really worked as a team. Basically, she's playing an actress who's observing me, who's an actress playing a character who has to learn things for her to imitate as the actress in the movie! It was so much fun."

Asked if she met Sarah Palin in preparation for Game Change, she says, "Absolutely not. It was excruciating because she was so well known and present in popular culture, I was terrified I'd get it wrong. I took all the music off my iPhone and only put on speeches by Sarah Palin. I'd put it on in the car and listen to her nonstop for two entire months. I was so afraid to hear anything else."

Paapa Essiedu, talking about starring in the new Richard Curtis festive film Genie and asked about acting with Melissa McCarthy, says: "Obviously when you do a movie penned by Richard Curtis you know the script is unbeatable, but then Melissa comes along, rips it up and adds so much. It's surreal, she is an elite improviser, and I had an out of body experience watching her. I had to remind myself to act. It was the great learning experience for me. She is brilliant."

Asked about playing Hamlet at the age of 25, he says, "It was my dream role at drama school and then to do it was amazing, and a really significant moment for me. It was a huge role and the most life affirming experience."

Jamie Oliver, talking about renewing his vows after 23 years, says, "It was my wife's idea and I thought I'd go along with it. Saying the vows a second time around actually meant something more - you've earned it rather than just saying it, and I loved it. It was actually a very nice thing to do, very romantic, and I ended up enjoying it more than anyone else."

Asked about his latest book 5 Ingredients Mediterranean, "Part of my job is to listen very hard to the public and what they want is short shopping lists and delicious things quickly. I did 5 ingredients five years ago and Jules said I must do another. She nagged me for two years and eventually I gave in! She's always right!"

Ricky Gervais, talking about his stand-up special Armageddon, says: "It is a jumping off point about what's going to end humanity - global warming, nuclear war, our own stupidity, people. I sort of conclude that it's not a bad thing if we wipe out humanity because the earth will return to a paradise in a few hundred years."

Asked about his process for creating a stand-up show, he says, "In the early days I would write more and do five warm-ups, then I was writing less, doing more warm-ups and letting the audience decide, and now for this one, I did 50 warm-ups and walk out with just a few notes. It evolves and it gets better and better. Then I start getting bored and I can't wait to start all over again."

Olivia Dean performs Dive live in the studio before joining Graham for a chat.