Rupert Grint may walk on red carpets, but with his glum smile and complete lack of pretension he seems as unaffected as the pub regulars enjoying afternoon beers back in his home village of Watton-at-Stone.

Grint will be 21 next month, but he seems older around the eyes and, like his character Ron Weasley, he doesn’t seem as driven as the other two members of his famous trio. Daniel Radcliffe wants to be the Laurence Olivier of his generation, and Emma Watson is sorting through a handful of career options, but Grint, well, he seems to be meeting the future with a good-natured shrug.

“I was thinking about what it’s going to be like when we’re done, after the last movie,” Grint said. “I don’t know what I’m going to do, really. I’m going to miss it, I think, because it’s been my whole life for a long time.”

Grint was sitting in his hushed dressing room at the cavernous “Harry Potter” set outside London, which has a ping pong table, a miniature billiards table, a huge television, a dart board and a giant cardboard cutout of his character. It’s a dorm room for a fellow who never had any interest in college and only adds to the sense that Grint is a lucky and carefree passenger on the “Potter” express.

But Alfonso Cuaron, director of the third Potter film has predicted that Grint was the most likely member of the “Potter” trio to go on to future stardom. Asked about that, Grint winced in embarrassment.

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