Zac Efron reveals kissing Michelle Pfeiffer was a dream come true; Matt LeBlanc talks about his dark side; while Lee Mack says stripping off made him vain; and Marina and the Diamonds performs live in the studio.

Joining Graham fresh from the premiere of his new movie, The Lucky One, and asked about working with so many dogs, Zac Efron says "There's this thing that you should never work with kids and animals, but believe it or not these dogs are so incredibly well trained they take the best direction. During takes the director would stop and say 'Zac, you missed your mark' and I would look down at the dog and he would be looking at me like, 'Dude, seriously unprofessional', with both paws on his mark."

Asked about working with leading ladies that are older than him, he says, "I had a huge crush on Michelle (Pfeiffer) during filming of Hairspray. She was an angel that turned up on set every day and I would try as much as I could to get close to her and strike up some awkward conversation - I was 18 and didn't know what I was doing. And then she was trying to get hold of me to see if I was doing New Year's Eve so I had two voice mails from Michelle Pfeiffer. It was the best experience of my life doing that movie with her. Driving around on a Vespa with her on the back, I felt like the king of the world. And kissing her was my dream come true. It was amazing."

Talking about the romantic scenes in his new movie he says, "The first time you read the lines you cringe but I have said way worst things in the moment."

Asked if his mother has seen the movie, which contains some raunchy scenes, he says, "Yes, I was at the premiere and she was two seats away from me. By the end of the scenes I am in my seat cringing with embarrassment but I hear my mum chuckling at the end going, 'That's my boy' and the theatre was dead quiet when she said it!"

Thanking Graham for congratulating him on his buff appearance in the movie, Zac says, "Thanks man, thanks for noticing," adding, "It was a lot of god damn push ups, a lot. It was a pretty intense training programme. I actually worked with a Navy Seal and weight training and diet almost overshadowed the entire filming process. I was up at 4.30 in the morning, training every day and eating between 4,000 and 5,000 calories a day. It was a lot, but it works - I had to do it to play a marine, these guys are a different calibre of human being. They are real men."

Matt LeBlanc, talking about the new series of his hit series, Episodes says, "I think it came off pretty good. It has a great cast and the writing is brilliantly funny and warm. I'm really happy with it."

On filming in LA for this series, he says, "We shot in the winter this time so we had to shoot some exteriors in LA because you could see your breath outside (in London) - it was a little bit too chilly to sell it as Beverley Hills."

And on the darkness of the 'Matt LeBlanc' he plays in the show, he says, "There is a little bit more emotional dismantling of Matt LeBlanc in this one. It takes it a step further and paints me even a little darker, I don't know what would happen in season three."

On winning a Golden Globe for the series, he says, "That was my fourth nomination and I was so prepared for them to say someone else's name. They called my name and everything just slowed down and I said to myself, 'Wow, that sounded an awful lot like my name,' and then everything was just strange and blurred and all I could focus on was thanking my mother. I then caught Steven Spielberg's eye and I started to sweat and I don't remember much else after that."

Talking about tattoos, he reveals he has two, "I have a motorcycle chain and my daughter's name on my arm and I have a black panther on my ass. I was drunk and stupid."

Asked if he cares about his weight, Matt says, "I don't care about anything. I go to the gym sure, why not. But I'm half Italian, I love to eat and have got the curves. It's a battle."

Lee Mack, on losing two stone in weight, says, "I started getting a bit vain and had to strip off for my sitcom - twice. I was 14 stone and had got a bit big. Because I have a long horse face people think I am skinnier than I am and then I strip off and have a body like old man Steptoe. I lost the weight too quickly and have put it all on now. And I have two shows on at once so now it looks like I nipped out to the gym between shows."

Marina performs Primadonna live in the studio, before joining Graham for a chat about her new album.