Al Pacino said he would love to work with Robert De Niro again. The 68-year-old actor, who stars alongside De Niro in "Righteous Kill," insists it is a "comforting" experience working with his friend.

Speaking at the U.K. premiere of 'Righteous Kill' in London's Leicester Square Sunday, told BANG Showbiz: "Working with Bob was a real comfort factor. He understands the way it works. We've known each other and been close for years so it's great for us to finally do something like this."

"We're looking at trying to do something together which we can develop from the start, something we can both oversee and be involved in."

"So hopefully we can get together again. That's a good thing to aspire to."

De Niro - who previously starred in 1995's "Heat" with Pacino - admitted he wished the legendary pair had worked together sooner.

The 65-year-old actor said: "I think we're both very comfortable with each other."

"I wish we hadn't waited. We were talking about projects before 'Heat', but it's not as easy as you would think to get a project going."

"Sometimes I wish I had been more proactive in getting something going, it just didn't happen."

When asked how he could top a film starring both De Niro and Pacino, director Jon Avnet said: "I don't know, maybe with Jack Nicholson."

The star-studded premiere was also attended by Curtis "50 Cent" Jackson and super-producer Mark Ronson.

"Righteous Kill" is released worldwide this month.

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