Many people have felt President Donald Trump's wrath on Twitter, but few non-politicians have been called out by him quite like Kristen Stewart.

Donald Trump had some harsh words for Stewart four years ago when he said she cheated on then boyfriend Robert Pattinson 'like a dog.'

Stewart told Variety at the Sundance Film Festival hours after Trump was sworn into office: 'He was mad at me a couple years ago, really obsessed with me a couple years ago, which is f***ing crazy.'

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Kristen Stewart said she remembers when Donald Trump was 'obsessed' with her in 2012

Donald Trump said on Twitter Kristen Stewart's then boyfriend Robert Pattinson should leave her in a string of tweets aimed at the couple

'I can’t even understand it. I literally cannot even understand it. It’s such far-out concept that I don’t want to believe that actually is happening. It’s insane.'

'At that point, he was just, like, a reality star. I had no reference. It wasn’t like really a thing. But in retrospect, somebody reminded me of that and I was like, "Oh my gosh, you’re right!"'

Donald Trump, who was hosting the 'Celebrity Apprentice' that year, took the Twitter to warn R-Patzz about trusting his 'Twilight' co-star.

'He can do much better': Donald Trump thought Robert Pattinson should leave his girlfriend because she cheated on him

Donald Trump asked Robert Pattinson to attended the Miss Universe pageant with him. Four years later he would be sworn in as the President of the United States

'Be smart, Robert': Trump's warning to Robert Pattinson was retweeted 50,700 times

Over the span of a month, Trump told Pattinson via Twitter: 'Robert Pattinson should not take back. She cheated on him like a dog & will do it again--just watch. He can do much better!'

Kristen Stewart remembered when President Trump went on a Twitter rant about her

'Everyone knows I am right that Robert Pattinson should dump Kristen Stewart. In a couple of years, he will thank me. Be smart, Robert.'

'Lots of response to my Pattinson/reunion. She will cheat again--100 certain--am I ever wrong?'

'Robert Pattinson is putting on a good face for the release of Twilight. He took my advice on...I hope!'

'After Friday’s Twilight release, I hope Robert Pattinson will not be seen in public with--she will cheat on him again!

Perhaps Pattinson did take the Donald's advice because he and Stewart split.

Trump also invited Pattinson to the Miss Universe pageant saying: 'If you saw the Miss Universe girls you would reconsider.'

Though he was critical of Stewart's infidelity, Trump has admitted to not being faithful himself. The president famously left his first wife Ivana Trump for Marla Maples in 1992.

Not all of Trump's tweets toward Stewart have been negative. In April 2013 he tweeted a link to a Hollywood Life video where he wished the star a happy birthday.

When asked for what advice he would give her Trump said Stewart was 'doing really well.'