Margot Robbie and her competitive side took on Jimmy Fallon and his 'Box of Lies' on 'The Tonight Show' last night and unlike her other late night game experiences, she didn't come away anywhere near victorious.

Turns out, Robbie is terrible at fibbing and even when she tries to come up with a really convincing lie for Fallon, she has plenty of tics and tells that give her away like her accent disappearing completely.

We really hope she never gets into poker because she stands to lose a lot.