Rupert Grint speechless on seeing Michelle Obama

Washington, (ANI): Brit actor Rupert Grint has revealed that he was left awestruck after U.S. First Lady Michelle Obama made a secret visit to the set of the latest Harry Potter movie.

Grint, 20, was busy with the shooting of Harry Potter and the Deathly Hallows earlier this month, when Michelle and her two daughters, Malia, 10, and 8-year-old Sasha arrived on the set.

The actor, who plays Ron Weasley in the wizard series, revealed that he is not easily impressed by famous people, despite working with well-known actors like Sir Michael Gambon, Helena Bonham Carter and Dame Maggie Smith, but he was left in awe of the First Lady.

"I'm not easily impressed by famous people, but nothing's matched this. I didn't think I was going to be nervous, then this huge motorcade pulled up at the studio and Michelle stepped out of a black Range Rover and everybody was speechless," Contactmusic quoted him as telling Live magazine. "It's hard to imagine (British Prime Minister) Gordon Brown having that kind of effect," he said.

Michelle revealed that America's First Family was huge fans of the Harry Potter movies - and that she was more thrilled about visiting the set than she had been about meeting British Royal Queen Elizabeth II.

"We sat around, ate cake and chatted. She said that the President is a big fan of the films and loves the books, and that she'd met the Queen the day before - but visiting the Potter set was far more exciting, that we were a lot cooler," Grint revealed.

"It was hard to take it all in. I kept thinking, 'Here I am talking to the First Lady'," he added.