Don't mess with Cara Delevingne.
After "Game of Thrones" star Richard Madden recently slammed the model/actress when asked about her viral, cringe-worthy interview with "Good Day Sacramento" from July -- calling her "unprofessional" -- Delevingne brutally called him out on Twitter on Tuesday night.
"@_richardmadden I have no idea who you are but I think it's little desperate for a grown man to be bad mouthing someone they don't know," the 23-year-old "Paper Towns" star tweeted in response.
"If you really want attention that badly, try focusing on your own work and not other people's," she added.
Madden, 29, then attempted to squash the beef, tweeting out an apology to Delevingne on Wednesday morning.
"Hi @Caradelevingne, nothing but respect for you," he wrote. "Misquoted and blown out of proportion. #SlowNewsWeek."
The comments in question are from Madden's recent interview with Style magazine. "It was unprofessional," he said of Delevingne's awkward morning television interview while she was promoting 'Paper Towns,' which ended with the anchors suggesting she "take a nap" after her sarcastic answers. "It made her seem ungrateful. She showed her age. For 'Cinderella,' I did six weeks of those interviews, where you get asked the same eight questions."
"If you're not capable of doing that gracefully, then don't do it," he added.
But at least Delevingne seems to have a sense of humor about her surprising feud with the "Cinderella" actor, later re-tweeting a meme of herself poking fun at Nicki Minaj's epic call-out of Miley Cyrus at the MTV Video Music Awards.
"Richard, what's good?" the caption reads.
Last month, the always candid British star surprisingly declared that she's quitting modeling in an interview with The Times, slamming the fashion industry. Watch below: