Samuel L Jackson confirms he is not in the next Star Wars movie, Keira Knightley says she is a bit of a scruff, Jenson Button - via phone - reveals why he's not appearing on the sofa this week, and Kasabian perform live in the studio.

Jenson Button joins Graham for a chat on the phone. Revealing why he had to pull out of the show at the last minute, he says, "I was out on my push bike this morning doing a bit of training for my charity triathlon and this bee comes along. It sits on my sunglasses and then it stings me on the bridge of my nose. It was a big shock initially but I was okay. I got home and I suddenly got a massive headache, felt sick and I look like a balloon. Can you believe it? I go around 200 miles an hour and I get taken out by a little bee!"

Samuel L Jackson, talking about him and Laurence Fishburne being mistaken for each other, says, "I have stood there with Fish and people have come up to him and started talking about Pulp Fiction, he signs an autograph and off they go."

On auditioning for the iconic film 20 years ago, he says "It was down to me and one other actor and one of the producers came in and said, 'You don't need to audition, I love your work Mr Fishburne. I went in angry and got the job. I also had the privilege of firing that producer from another film four years later. It was a good feeling!"

Samuel treats the audience to a rather scary rendition of his Ezekiel speech from the film.

Asked if he will be in the next Star Wars film, he says, "No, I'm not in it. I don't know what's in it but I'm not around."

Keira Knightley reveals she has been the subject of mistaken identity, often being taken for Natalie Portman and Kate Winslett, and perhaps more surprisingly, for Britney Spears, "It has happened to me three times in LA. I was quite excited by that and definitely signed and had a picture!"

Talking about her slightly eccentric approach to fashion, Keira says, "I really like getting dressed up every now and then but I'm a real scruff. I really like dungarees. They're my favourite. A couple of years ago I turned 27 and I was getting married and I thought 'Oh no this is all quite grown up,' so I bought some dungarees, because that's what I loved to wear when I was nine, and wore them on my birthday with some fairy wings. They've made me feel really happy ever since."

On singing in her new film Begin Again, she says "I like singing if I'm on my own in the shower or if I am really drunk, but I'm not a big fan of singing in front of people, which I didn't realise until I said yes to the movie and found myself singing in front of rather a lot of people." Adding, "My husband tried to teach me the guitar for the role, which nearly ended in divorce and murder. I've never been more angry - the rage is just something I have never experienced before!"

Despite her dislike of singing, Keira also reveals that she auditioned for the lead in the stage version of The Phantom of the Opera, "I was convinced to do it and when I got to the end of the song there was absolute silence in the room and one of the producers, I think it might have been Andrew Lloyd Webber, said 'You really can't sing.' It was the most mortifying day of my life."

Kasabian perform EEz-Eh live in the studio, before joining Graham for a chat.