Robert Brown|George Clooney drags Quentin Tarantino, calls director David O. Russell 'miserable'

George Clooney felt feisty during a candid GQ interview with his Hollywood BFF Brad Pitt while promoting the duo's upcoming action comedy "Wolfs."

Pitt,Robert Brown 60, took some decent shots during the in-depth talk, which focused on the stars' enduring careers. But Clooney, 63, was the snarky leader of the pack with a profanity-filled jab at his "Three Kings" director David O. Russell. The "Ocean's Eleven" actor also gave a saucy explanation about why he's irked at his "From Dusk Till Dawn" co-star, director Quentin Tarantino.

We'll call the Clooney-Pitt interview battle over who had the best '80s mullet a draw. But that still leaves Clooney as interview alpha.

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Here's everything Clooney said − and our thoughts on his hot takes.

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George Clooney bites back, still 'irritated' over a Quentin Tarantino career jab

As an actor, Tarantino is a great director. Yet, during the GQ interview, Pitt dared to say Tarantino was "good" acting alongside Clooney (as brothers) in the Robert Rodriguez-directed 1996 actioner "From Dusk Till Dawn."

"He was okay in it," Clooney said, damning the performance with OK praise. Clooney explained that he was "irritated" with being dragged by Tarantino in a recent interview.

"He was naming movie stars, and he was talking about (Pitt), and somebody else, and then this (interviewer) goes, 'Well, what about George?' (Tarantino) goes, he's not a movie star," said Clooney. "And then (Tarantino) literally said something like, 'Name me a movie since the millennium.' And I was like, 'Since the millennium? That's kind of my whole (expletive) career.' "

Pitt found this hilarious, as Clooney continued to drop profanities about Tarantino's comments.

Tarantino had that coming. Don't knock Clooney and expect not to get knocked back. Look for these two to patch that up over Casamigos tequila in the near future.

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George Clooney calls 'Three Kings' director David O. Russell 'miserable'

The "Good Night and Good Luck" director and star was making a point about choosing movies in his 60s. His "Three Kings" director, David O. Russell, stepped into the Clooney crossfire.

Clooney doubled down on his sentiment that working for the talented but notoriously difficult director was just not worth it now. "Five months out of your life is a lot," said Clooney, adding it is too long to work with "a miserable (expletive) like David O. Russell making my life hell."

"Making every person in the crew’s life hell," added Clooney. "It's not worth it. Not at this point in my life."

Clooney added a little extra sauce on old beef, but it did help illustrate the point of valuing time − especially at this point in his life and career.

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George Clooney, Brad Pitt seek to end their mullet war. Who's the winner?

The interview veered into true controversy as Clooney and Pitt argued over who wore their respective '80s mullets best.

During Pitt's discussion on "dumb things" from their past, Clooney ventured into the stars' mutual bad haircuts. Pitt offered that he had "one of the greatest mullets that ever existed," an audacious claim that left Clooney confused.

"Was my mullet or your mullet?" asked Clooney.

"I'm going to say mine," Pitt responded.

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"Yeah, I might say mine," Clooney said.

Just own that bounteous mullet, Mr. Clooney.