Don't get in a war of words with Margot Robbie.
Will Smith and Margot went head to head throwing some playground insults on Scott Mills's Radio One show - but Will never really stood a chance.
Margot started off strong, telling her Suicide Squad co-star: "Your ears stick out so much I could use them as antennas and connect to the Wi-Fi at my Mum's house back in Australia."
Stumped for a reply that didn't involve insulting Margot's mum, Will faced a barrage of jibes from Margot, who told him: "You look like a less hot version of Obama," and "You're so old I had to Google The Fresh Prince of Bel-Air, I didn't know what it was".
She also told him: "You were the worst looking cast member in I Am Legend," which featured zombies and dogs, and added: "You have the face of a 20-year-old but the hearing of a 90-year-old."
After Will finally cracked a joke about spending the night with Margot's mum, Margot retaliated with: "Yeah well, she didn't even bother to call you back... she thought your nickname was Big Willy, but turns out... she felt so mislead by that nickname."
Deep burn, Margot!