Kurt Russell talks about Elvis, Tina Fey says she almost made Robert De Niro laugh, Josh Widdicombe talks about his Hobbit ambitions and Sia says she wants to reveal more of herself.

Kurt Russell, recalling his earliest acting experiences, says, "I was in It Happened at The World's Fair with Elvis when I was 10. He was a really nice man and he was the first celebrity I ever met. He arrived on set in a limo and when he jumped out of the car two or three thousand women just started screaming and I thought to myself, 'This guy must be famous!'"

Asked about his new movie The Hateful Eight, he says, "Well it's Tarantino, so you know there will be blood!" And on working with the director, he says, "I love the guy. You have to come to the set prepared to give everything you can think of and you'll have the greatest time you could have on a movie set. The love of what he does is infectious. If you come ready to play, you'll have the time of your life."

Talking about the strict rules Tarantino has on set, Kurt says, "One is, 'No devices that you can switch on and off,' and the another is tougher because I like to sleep on set and he won't allow it. If you are caught, your photo is taken with Big Jerry, a very large purple dildo next to your face and the photo is displayed on the wall. And, as you get older you like to take more and more naps!"

Asked about the enormous beard and moustache he sported for the role, he says, "It was a moustache wearing a man. It took me four months to grow. Goldie didn't think much of it."

Revealing he auditioned for the original Star Wars, Kurt says, "Guys my age were all lining up to be in it. I read for both Hans Solo and Luke Skywalker. At the time we were saying, 'the Millennium Falcon this' and 'the Death Star that' and we had no idea what we were talking about. There was a western show I had been chosen for and I had to make a choice so I asked George Lucas if he thought he would use me but he said he didn't know so I went for the western - I had to work."

Tina Fey, talking about her film Sisters being released on the same day as the new Star Wars movie, jokes "It's too soon to tell which of them will be number one. Two years ago the studio said, 'We've got an amazing idea...' It's what they call 'counter programming.' It's like when they put on gay shows during the Superbowl!"

Talking about being an early bloomer, she says, "My mother took me to a department store and made me try on bras over my clothes in the middle of the shop. It was mortifying and I just shouted, 'No Mummy, no!'"

Asked about Saturday Night Live, and recalling some of the celebrity hosts she has written for, she says, "I once wrote a sketch for Robert De Niro as Thomas Jefferson, as they had similar qualities! I was star struck and remember thinking it was the best readthrough of all time. Bob was laughing so, so hard and then we actually got to do it later in the week and we got to thinking maybe he was high in the readthrough because it wasn't that funny. I did think for a moment that I must be the funniest comedy writer ever to make Robert De Niro laugh, but it turns out I'm not!"

Josh Widdicombe, revealing he was up for The Hobbit, "I was asked to audition for it, but I didn't get it. I thought I would at least get some extras work out of it. The most galling thing about it is that they lowered the maximum height requirement because they had so many people, and my agent called me to say I'd still qualify as a Hobbit!"

Talking about one of his early gigs, he says, "I performed to an audience of two. It was their first date and clearly it didn't go well because in the second half I was performing to an audience of one!"

Sia performs Alive live in the studio, before joining Graham for a chat.

Donning an extraordinary wig that only reveals her bright red lipstick, she says, "I was going to reveal my face but not really my face - I tried it with prosthetics but it wasn't cool enough.

Asked about the image of her on the cover of her new album she says, "That is my face but with some digital work and sticky tape!"

Talking about Alive being co-written with Adele, she says "We were writing it for her new album but it didn't fit with the other tracks so she rejected it. I sent it to Rihanna's people and they rejected it, but in the meantime everyone said I should do it myself."

Asked why she had performed a slightly different version of the song on the show tonight, she says, "I'm bored of singing it the same way." Adding, "I can't sing any of my songs in the key I originally recorded them in. I don't know how those kids on The X Factor do it - it's crazy how they hit the high notes. Adele gave me a great tip if I ever tour my songs - before hitting the high notes I'll turn the microphone on the audience and let them do it!"