The Moneyball star has revealed schemes to prank his pal George Clooney.
The Hollywood hunks are renowned for their on-set high jinks, but Pitt insists he has the perfect hoax up his sleeve.
'I've been sitting on one that is so brutal, and so ruthless,' the actor told Extra. 'I've had it in my pocket for about five years, I think.'
The 48-year-old added that because they're both skilled in practical jokes, they need to be extra careful.
'We are like two nuclear super weapons at this point,' joked the heartthrob. 'We shouldn't launch because we will annihilate each other.'
The father-of-six has recently been able to start walking without a cane after reportedly injuring himself on holiday.