Brad Pitt insists that four kids are not enough for him and partner Angelina Jolie.
Talking to CNN talk show host Larry King, the actor revealed that he's looking forward to adding more members to the family.
"We're just getting started," usmagazine.com quoted him, as telling King.
However he did admit that raising kids was the 'hardest job in the world'.
"The hardest job in the world. The most rewarding job in the world. There's something to - with the long days in here, we're out here as soon as the sun comes out and to come home and have dinner with your kids and have to discipline one of them who is out of line and still have the energy for that is - I can't explain the fulfillment of that but it is everything," he said.
Pitt also talked about Jolie's parenting skills, calling her a 'fantastic' mom to their kids Maddox, 6, Pax, 4, Zahara, 2, and Shiloh, 1.
"Dedicated, kids first. [She's] really inventive and great fun to them and very, very protective," he said of his partner.
He also reiterated to his host that he would be doing lesser number of films in the future.
"It's become less and less a focus as I get older. I think it's really more of a younger man, younger woman's game," he said.
The Jolie-Pitt clan is currently in New Orleans to launch Make It Right, a project to build affordable, environmentally friendly housing in the city's Lower Ninth Ward.
They also plan to spend Christmas there.