Nicolas Cage taps into his inner-mole 

A fake friend can be bought in Hollywood but a true relationship is priceless. Just ask Nicolas Cage and Jerry Bruckheimer.

Over two decades, the actor and producer have joined forces on seven films and haven't disappointed each other yet.

Success has that effect. Their films have earned more than $2 billion at the box office and created at least one franchise that's still going strong.

That would be the two National Treasure movie adventures -- a third one is in the works -- which scooped up $805 million US at the box office. Before that they did hit action flicks The Rock and Con Air, which set the standard of hiring respected supporting actors to back Cage in his lead roles.

Even their car thief caper flick Gone in Sixty Seconds managed more than $200 million US world wide despite mediocre reviews.

Perhaps, the biggest challenge lies ahead for them. The Cage-Bruckheimer team is just completing The Sorcerer's Apprentice in Manhattan, the live action movie version of Disney's classic animation Fantasia with Cage playing Balthazar.

Without a doubt, though, their cutest collaboration is G-Force, which opens on Friday. In the 3D part-live-action, part animation fantasy directed by Hoyt Yeatman, Cage voices Speckles the mole, a computer and communications whiz and part of an undercover special forces group of well-trained talking guinea pigs.

They include leader Darwin (Sam Rockwell), danger dude Blaster (Tracy Morgan) and sexy martial arts specialist Juarez (Penelope Cruz).

On the human front, Will Arnett plays an FBI commander who wants to shutdown the G-Force experiment while Zach Galifianakis (from The Hangover) is the G-Force creator proclaiming how valuable the unit is just as a villain industrialist (Bill Nighy) tries to take over the world.

The odd thing is Cage's character turns out to be a support player. But two factors made the offer to be in G-Force irresistible. For one, Bruckheimer asked him to do it. For another, Cage figured his four-year-old son Kalel would get a kick out of the movie.

"I didn't have to get in touch with my inner mole because I'm always in touch," says 45-year-old Cage smiling. "It came quite quickly to me."

But that's not to say his voice is recognizable. In fact, Cage didn't tell his son what part he played and the toddler never guessed when he attended a recent screening.