Ashton Kutcher's two-year-old daughter can already speak three languages

He said: "It's weird because girls advance apparently faster than boys. I didn't know this, but on research, like early childhood advancement.

"My daughter is like two and a half, she speaks three languages, she's got like Russian and Spanish and English. She actually understands and speaks them."

However, Ashton says his six-month-old son Dimitri Portwood - who he has with his wife Mila Kunis - sounds like a "pterodactyl".

He added: "The boy is just like a 'thuck'. Just a chunky, like, 'BAAHHH'. He sounds like a pterodactyl, and he's not coming around ...

"Wyatt, I had her 'papa' at four months. She was like, 'Papa, papa' and I was like, 'Aw.' The boy is like, 'BAHHHHH.'"

The 39-year-old actor, though, feels very lucky to be a father.

Speaking on The Tonight Show with Jimmy Fallon, he said: "I invented another human, I just keep inventing them. That's the second one. That's my second invention. It's amazing, it's so cool. He's six months now so I've had him for a little bit, I haven't thrown him out yet."

Meanwhile, Ashton previously admitted he is a better son since becoming a father himself.

He said: "As soon as I had kids, I called my parents and apologised because I had no idea how much they loved me ...

"That celebration happens every day I open the door, every day I go in their room and see them in the morning, every day we share a little secret or pass a message to each other. The act of being a father in itself is the gift."