Could Keira Knightley's love interest in "The Duchess," Dominic Cooper, be a steampunker?

When we caught up with the actor at the opening night of "Equus", he didn't want to talk Harry Potter, as did a lot of the celebs who came to see Daniel Radcliffe on Broadway. Nope -- for Cooper, the fantasy series he's most into is "His Dark Materials," the Philip Pullman trilogy from which the movie "The Golden Compass" and inspiration from steampunk came. Cooper had played the part of Will during the Royal National Theatre adaptation, and he hopes to land a part in one of the proposed sequels.

"I tried to get Keira," who's read all the Harry Potter books, "into the Philip Pullman ones, but she wasn't having any of it," Cooper said. "No luck. I think you're either a fan of one or the other, is how it works. But why can't you be both in life?" Read more...

With roles in "Pride & Prejudice," "King Arthur" and, of course, "Pirates of the Caribbean," Keira Knightley is no certainly stranger to dolling herself up in the fashion of the day. Case in point, her role as a love-struck royal in "The Duchess." We already rolled out an exclusive clip from the film, now we talk to the star herself about her fancy duds. Check it out below, and then click here for more of our chat.

Keira Knightley has a way with costumes. She rocked the seven seas in "Pirates of the Caribbean," picked up a bow for "King Arthur" and now she's going full-on Victorian for "The Duchess," which sees the star strapping on a corset for a scandalous royal love triangle as the Duchess of Devonshire. Below, check out an exclusive clip from the film which finds her fallen for a young politician. "The Duchess" -- co-starring Ralph Fiennes -- rolls out in limited release September 19.