"Angie and I will consider tying the knot when everyone else in the country who wants to be married is legally able," the actor tells Esquire magazine for its October issue.
Of course, the couple are already living in domestic bliss with their three children, Shiloh, who was born in May, Maddox, 5, and Zahara, 1.
Of the older two children, whom Jolie adopted and Pitt is in the process of legally adopting, the 42-year-old actor says the fact that they aren't his biological children doesn't set them apart from their sister, Shiloh.
"They're as much of my blood as any natural born, and I'm theirs," Pitt tells the magazine, which hits newsstands Sept. 19. "That's all I can say about it. I can't live without them. So: Anyone considering (adoption), that's my vote."
And Pitt says he's a pretty laid back dad.
"I try not to stifle them in any way," he says. "If it's not hurting anyone, I want them to be able to explore. Sometimes that means they're quite rambunctious."
Still, Pitt, whose next film is the drama Babel, says communication is the key with kids: "I feel it's really important to have that time to sit and talk to them," he continues. "I really like that last minute before they fade off. And always give them a heads-up before you jerk them out of something. You need to tell them, like, 'You have three more minutes.'"