WATCH: Margot Robbie’s brother crashing her interview will make you laugh

Cape Town – Margot Robbie’s reaction to her little brother, Cameron, unexpectedly dropping in on an interview is the cutest thing ever.

The adorable surprise went down during an interview with MTV Australia to promote her latest flick, Peter Rabbit.

Margot, sat beside her co-star Elizabeth Debicki, gets the surprise of her life when Cameron walks in to conduct the interview.

What follows is Cameron very seriously asking questions as Margot tries to keep her cool. And poor Elizabeth is caught in the middle of the hilarious tension.

WATCH THE SWEET VIDEO HERE: