Khloe and Kourtney Kardashian were banned from giving speeches at family events after their drunken toast at sister Kim's second wedding.

Eldest sister Kourtney, 44, made the revelation in a post on Instagram revealing the pair are no longer allowed to get up and speak during their gatherings after they gave a "drunken speech" when Kim tied the knot with Kris Humphries back in 2011.