He said: "They're trying to kill us! They really are. We'll get them to bed and one will show up about a half hour later. I know they've got shifts, they got it worked out."
The 44-year-old heartthrob further insists that he's a strong daddy and a hard one to knock out when it comes to coping up with kids. Pitt told: "I'm tough as nails. I'm impervious to poo, snot, urine, vomit. You can't get me. You cannot break me down."