'Harry Potter' star Rupert Grint says Lindsay Lohan can't act.

Grint, who plays the boy wizard's sidekick Ron Weasley in the hugely successful film series, was disappointed after meeting the star, and insists he doesn't respect stars like her.

He said: "I met Lindsay last summer and she talked about herself a lot. She said she was going to win an Oscar before she turns 25. I just kept thinking, 'But you can't act'. I haven't met Paris and don't want to either. She and Lindsay are the type of girls you need to stay away from."

Back on the set of his latest film, 'Harry Potter and the Half-Blood Prince', 19-year-old Grint has confessed he found filming love scenes with co-star Jessie Cave - who plays Lavender Brown - awkward.

He said: "It took almost a whole day to shoot. It was hard to concentrate when Emma Watson was glaring at me even though it was part of the scene. It felt like she was plotting my death every time Lavender came at me. It was all very intense but a lot of fun too."