Anne Hathaway reveals how her husband proposed, Matthew McConaughey talks about the scale of his latest movie, Lena Dunham reveals she once took a vow of celibacy and Micky Flanagan says he hates travel, while Sia performs live in the studio.

Anne Hathaway, talking about her new film, Interstellar, which her co-star Matthew McConaughey describes as "Enormous", says "The first time I saw it was very special. I saw it with my dad. I am normally very self critical but on this movie it's so big it just swept me up and took me to another place. I didn't care and wasn't interested in criticising myself. I was just so happy to be in the place I was. I watched it holding my breath and when it finished I started weeping and didn't stop for two days!"

Matthew adds "I've never been part of something this big. The scope and scale of it is very ambitious. No one gets more bangs for your buck on screen than director Chris Nolan and in this one he ups himself, it's epic. It's a major experience."

Asked about filming the zero-gravity scenes, Anne demonstrates her rather unique 'floating in space' technique."

Talking about her Oscar-winning role in Les Miserables, and asked whether the hair-cutting scene was traumatic, she says, "It was my suggestion because it raised the stakes for the audience. When the cutting started I was very nervous. It was weird." Revealing her husband proposed to her just after she agreed to do it, she says, "I was very excited when I put the phone down and he said, 'Okay darling, there's probably one thing you're not thinking about. How do you feel about being a bald bride?"

Asked if there is going to be another The Devil Wears Prada movie, she says, "Wouldn't that be fun. I'd love to do that but I don't know if there is any plan for it."

Talking about working with Meryl Streep in the original film, she says, "She is the most amazing, magical, warm person, she's fun and super maternal. When I met her she gave me a huge hug and I'm like, 'Oh my god, we are going to have the best time on this movie,' and then she's like, 'Ah sweetie, that's the last time I'm nice to you.' She then went into her trailer and came out the ice queen and that was really the last I saw of 'Meryl' for months, until we promoted the film."

Matthew, talking about his friendship with Anne says, "I invited her to a party and she showed up - a little tardy - but she showed up precisely at 6pm... the next day!" Revealing he made Anne and her husband welcome anyway, he says, "Nine hours later we had stopped counting the wine bottles and we had crashed two other parties. It was excellent!"

Asked about Magic Mike 2 and whether or not he is in it, he says, "Not yet. They're still shooting. But I don't believe so."

Talking about his first brush with awards in the late 70s, Matthew says, "My mum told me I won Little Mr Texas when I was eight and over the years I've told everyone else. It was only when I looked closely at the photo of me holding the trophy that I saw it said, 'Little Mr Texas Runner Up. When I asked my mum, she said, 'They must have misprinted it!"

Lena Dunham, talking about her book and her early life, says "I took a vow of celibacy when I was nine. I wrote down the contract on paper and then ate it. My mother had refused to sign it. It turned out to be completely unnecessary anyway!"

And on attending showbiz parties, she says, "I don't get invited. I don't go to very many parties. I don't drink yet I still end up sloppy and offensive - it's a special talent! I went to a very fancy party as the guest of Judd Apatow and I felt like a weird alien the whole night. As as long as I live I would not feel comfortable in that arena."

Micky Flanagan, talking about his new series, which is set in France, reveals, "I don't like travelling but I do like a holiday where there's a nice hotel, food, a television and a mini-bar. I don't like this idea that people put themselves through torture when they go away."

Sia Performs Chandelier live in the studio before she and Graham chat about her album and her unique performance style.

Keeping her back firmly to the audience, she says, "I miss the audience and I miss being part of a conversation and it feels a bit bratty now but that wasn't the intention. I don't want to be famous or recognisable. It's a hard life and I have some famous friends and I see how difficult their lives are because of it. I am ambitious and I want success but I don't want to be famous."