Brad Pitt is "impervious to poo, snot, urine and vomit".

The 'Ocean's 13' actor — who raises six children with partner Angelina Jolie — revealed becoming a father has toughened him up and ensured he can cope with anything.

He said: "I'm tough as nails. I’m impervious to poo, snot, urine, vomit. You can't get me. You cannot break me down."

Pitt (44) said he and Jolie don't often take their brood shopping because it is such a struggle to get everyone organised.

He told Oprah Winfrey in an interview, which aired on Wednesday: "We don't go to the mall. It's like a half-an-hour just to get everyone buckled in and make sure they've got their snacks, and Zahara has got a blanket and Shiloh's got her silky.

"Angelina is militant about it. She's right on top of it. Because I'm always forgetting something!"

Meanwhile, Jolie said she only breastfed her four-month-old twins Knox Leon and Vivienne Marcheline for the first three months because she struggled to cope with feeding the babies simultaneously.

Angelina said: "You think: 'Ah, if anybody can do that, I can do that.' There's this football hold — it's a lot harder than it looks in the books. I did that a few times. I would take turns. It just takes a long time."