06/22/2007 at 10:00 AM EDT
Life on the Harry Potter
set apparently is as chummy as it appears onscreen: Emma Watson says when she needs help understanding guys, she turns to her costars.
"If I'm having boy troubles, I'll occasionally go and chat to Dan [Radcliffe] and Rupert [Grint] and say, 'What is going on here? I don't understand,' " Watson, 17, recently said at a London press conference for Harry Potter And the Order of the Phoenix
, which opens Tuesday in Britain and on July 11 in the U.S.
"Don't ask her what she means by boy troubles," added Radcliffe, also 17, as the three shared a laugh.
Watson last month said she didn't have a "type,"
but liked "guys who are into sports and love it when they speak two or three different languages."
Watson also explained why she took much longer
than Radcliffe and Grint to join up for the final two Harry Potter films.
"I didn't sign the contract immediately because I needed some time to figure out the logistics of combining making a Harry Potter film – making two more Harry Potter films – and combining that with my school timetable," she said, adding that she found it "quite frustrating and upsetting all the insinuations that were made about why I was holding off."
"I really want to go on to university," said Watson, who's studying English literature, geography, and history of art. (She's previously said she hopes to attend Cambridge.) "I really wanted to continue what I was doing. I didn't want to have to give either one up. So I was in this really difficult position."
Grint already has left school, and Radcliffe studies with private tutors.
Added Watson, whose busy schedule sounds like it could use a little magic: "Warner Bros. have been extremely supportive of helping me figure out how to [combine studying and working]. They've given me Monday mornings off so I can go into school and I can see my teachers and pick up my work. They've provided all the tutors that I need to get all of my work done. They've got a box every Friday which I can put my work into which they'll send back to my teachers, they'll mark it, they'll send it back to me."
Meanwhile, J.K. Rowling's publisher, Scholastic, Inc., announced Monday that the author's seventh and final book in the series, Harry Potter and the Deathly Hallows
, in anticipation of its July 21 publication date, has set a record as Amazon.com's most pre-ordered product, with nearly 1.6 million copies bought around the world.
The retailer said this surpasses the previous record of 1.5 million copies set by the last book, Harry Potter and the Half-Blood Prince
– and that sales of No. 7 are still expected to grow by "many more hundreds of thousands of copies," Reuters reports.