"I'm very grateful to have been part of Harry Potter and I'm kind of part of the furniture at Hogwarts now," he admits.

"I'm working on Order of the Phoenix right now. I'm hoping it will be the best Harry Potter yet. They do just get better."

Warwick is good pals with Harry Potter star Daniel Radcliffe due to a shared child actor upbringing.

"I get on really well with Daniel. I've known him since the first movie and he's grown up and not changed at all. He's a great character.

"The child actors on the film are a lot more professional than some of the adult actors I've worked with. They know their lines, they're there on time, it's brilliant to watch them work."

He continues: "Daniel and I chatted about being child actors. We definitely have had comparable experiences. He just deals with it so well. He's very good and really appreciates the fans."

He adds: "I think he'll evolve into a highly-regarded adult actor. I'm hoping he'll make that transition because he has a lot of talent."