Will Smith cries whenever he sees his son Jaden on the big screen.

The 41-year-old actor - who produced the 12-year-old actor's latest work 'The Karate Kid' alongside his wife Jada Pinkett Smith - takes delight in seeing how hard the youngster loves to work and admits he and the movie's other star Jackie Chan were constantly pushing him harder.

Will told BANG Showbiz: "I don't choke back emotion, I boo-hoo every time I see him. It doesn't even matter.

"He's so disciplined and so hard working that it's hard not to push him for more. There's no telling what this kid could do. Jackie Chan and I were having our little private meetings about how to work around mummy. But it was such a wonderful experience. That movie really chokes me up."

The 'Men In Black' actor - who also has nine-year-old daughter Willow with Jada - also joked his son has the best characteristics of both of his parents.

He said: "He's truly his own being. The best of Jada and I. It's just amazing, amazing that you can go to Mexico, drink some tequila, and then he shows up nine months later. It's amazing."

However, while filming the action movie - a re-imagining of the popular 80s movie series - work had to be extended by an extra month, something Will was not brave enough to tell Jaden.

He said: "We got toward the end of the film and it got extended by an extra month. So you tell an 11 year old that we are going to have to stay for an extra month when he was getting ready to go home. Leave that to mommy!"