American Pie star: ‘David Cameron is a lunatic’

David Cameron is a lunatic obsessed with Britain's colonial past, the lead actor in American Pie has said.

Speaking to, Jason Biggs, who plays Jim Levenstein in the hit US comedy series, also backed disgruntled Tories who want their leader replaced with Boris Johnson.

"Cameron just seems like a lunatic," he said, having watched the Conservative leader's conference speech last month.

"Cameron was like: 'England rules all, we conquered everyone, we're the best'. OK, well what are you going to do in 2015? What are your plans?"

The outspoken American actor, who was in London promoting his new film Grassroots, took a dim view of a video in which Cameron went for a curry with his wife to celebrate his birthday.

"I saw that horribly contrived video of him walking down the street in Birmingham with his wife," he said.

"It was like: 'Oops, the cameras just caught us, we're going for a date'. Are you kidding me? Is there a person in the UK who believes this?"

Biggs was much more sympathetic to the London mayor, who toured US TV studios last year while promoting his new book.

"He did all the shows and Letterman. He was incredibly likeable," he said.

"There's something about him. If I voted Tory, I would vote for him.

"Is he really a prime minister-type leader? I don't know, but it seems to me he's doing a good job with London."

Grassroots is released in the UK on November 9th.