NEW YORK - Bruce Willis says being a film star hasn't brought him many perks. "It's really ... weird to be famous," the 52-year-old actor tells Vanity Fair magazine in its June issue, on newsstands May 8. "It gets you into restaurants easier than other people, but beyond that, personally, you could set fame on fire."

Willis reprises his role as John McClane in the upcoming "Live Free or Die Hard," the fourth installment in the action series, which began in 1988.

"A lot of the physical stuff that they had me doing (for `Live Free') was still, let's say, low-tech," he tells the magazine. "I don't bounce as well off the concrete floors as I used to. There are those `ouch' moments that actually hurt."

"It gets really un-fun on Take Two, you know? You hope they got it in Take One," he says. "I'm glad I didn't wait a couple more years to do this."

Willis, who has three daughters from his marriage to Demi Moore, says he's not a popular subject in the press these days.

"They're not writing about guys my age much anymore, unless I do something naughty," he says. "They're writing about the kids. That's what drives the pop culture now."

As for his relationship with Moore, who married "That '70s Show" actor Ashton Kutcher in 2005, Willis says: "It's hard to understand, but we go on holidays together. We still raise our kids together — we still have that bond."

"Demi is the mother of my children and Ashton is the stepfather of my children," he says. "I'm thrilled that Ashton turned out to be such a great guy. I love Demi, and I know she loves me."

"Live Free or Die Hard," from New Corp.'s 20th Century Fox, is set for release June 27.