Grint's brain-teasing kiss with Watson
The 20-year-old actor, who plays misfit wizard Ron Weasley, is set to shoot the saucy scene with Watson in February (09) for the series' seventh instalment Harry Potter And The Deathly Hallows.
Grint used word puzzles to break the ice with Welsh actress Kimberley Nixon as the pair filmed steamy bedroom sequences for their new movie Cherrybomb.
And he's hoping a stack of crosswords will ease the stress of kissing his long-term pal Watson.
He says, "As I've known Emma for so long, I reckon it will be 10 times worse. I really love the seventh book, but there is no way it will be tame with the Hermione stuff.
"I don't think it's (the Cherrybomb scene is) quite up there with Dan's Equus (co-star Daniel Radcliffe's naked Broadway performance), but it was quite a surreal experience, especially as we were sharing the bed with half a dozen camera crew. But, yeah, I was quite nervous, I think we both were.
"It was a new thing for the two of us - though, weirdly, I remember Kim and I doing a crossword in between takes. That definitely took our minds off the deed. I'll have a stack of crosswords at the ready (for Watson)."
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