Matt Damon has joked that he "doesn't know" how George Clooney will cope having twins.

Matt Damon

Matt Damon

The 46-year-old actor - who has three daughters, Isabella, 10, Gia, eight, and Stella, six, with his wife Luciana Barroso, and is also step-father to Luciana's 17-year-old daughter Alexia - is thrilled the 'Ocean's Eleven' star is expecting twins with his wife Amal, but has joked there's "no way" he'd be able to cope having two young children at the same time.

Speaking during an appearance on 'The Ellen Degeneres Show' on Thursday (16.02.17), he said: "[George] said to me, 'Well, you have four.' And I said, 'Yeah, but not at once!' We did it one at a time. I don't know how anybody does twins. Those sleepless nights ... and there's two of them? There's just no way. But we'll see."

Meanwhile, the 'Great Wall' star previously admitted he "almost started crying" when his close friend shared the happy news with him when the human rights lawyer was just eight weeks into her pregnancy.

Matt said: "I was working with him last fall and he pulled me aside on set and I mean, I almost started crying. I was so happy for him. And I was like, 'How far along is she?' And he goes, 'Eight weeks.'"

The star then scolded the 55-year-old actor for telling him the news before Amal had entered her second trimester.

He said: "[I said,] 'Are you out of your mind?! Don't tell anybody else! Don't tell anybody else! Don't you know the 12-week rule?' Like of course he doesn't. 'Just shut up, man.' And then four weeks later, I'm like, 'We're good right?' [George confirmed] 'We're good.'"

Matt thinks George is very lucky to have found Amal, 39, and believes they'll be great parents.

He added: "So yeah, I'm thrilled for him. She's amazing. He hit the jackpot. Just on every level. She is a remarkable woman. They're gonna be great. They're gonna be awesome parents. Those kids are lucky."