George Clooney thinks Miley Cyrus is "fantastic."

George Clooney

George Clooney

The 54-year-old Oscar winner recently teamed up with the 22-year-old singer and Bill Murray to film a 2015 Christmas TV special and says he was very impressed by her work ethic.

The Oscar winner said: "She was fantastic to work with, I'm telling you - like, fantastic and fun and a real pro."

The 'Tomorrowland' star, who is also friends with Miley's father Billy Ray Cyrus, as they both hail from Kentucky, also claims Bill was equally happy to work with the 'Wrecking Ball' hitmaker.

He told 'Access Hollywood': "Bill Murray and I had drinks a few nights ago and he was just talking about how impressed he was as an entertainer and also just as a - just in general as a pro - how professional she was. I really liked her."

Meanwhile, George admits his 37-year-old wife Amal Clooney, whom he married in September, is still struggling to understand his love of watching sports.

He told 'Extra': "She goes, 'Every weekend we're watching a sporting event?' And I was like, 'Actually, that's kind of how it works.' "

The star recently celebrated his birthday, but laughed off rumours British human rights lawyer Amal bought him a new Porsche.

Asked what he received from the brunette beauty, he said: "Ummmm, I can't tell you. But it wasn't a Porsche.

"Didn't get a blender, didn't get a Porsche."