Teenage climate activist Greta Thunberg has taken aim at US President Donald Trump over his baseless claims of fake voter fraud - and it seems she has a long memory.
Last year, Mr Trump mocked Ms Thunberg after she was named Time's Person of the Year.
"So ridiculous. Greta must work on her Anger Management problem, then go to a good old fashioned movie with a friend! Chill Greta, Chill," Mr Trump wrote on Twitter at the time.
Ms Thunberg, 17, found her moment to hit back when Mr Trump tweeted, "STOP THE COUNT!" - one of the president's unsubstantiated claims of voter fraud made during this week's election.
“Donald must work on his Anger Management problem, then go to a good old fashioned movie with a friend! Chill Donald, Chill!” the 17-year-old Swede tweeted.
Ms Thunberg has long been a vocal critic of the US president and his administration's climate policies.
After Mr Trump's tweet last year, she briefly changed her Twitter biography to “teen working on her anger management problem”.
The president's criticisms of her at the time drew widespread criticism as being patronising.
When polls opened in the US this week, Ms Thunberg urged her social media followers to "use their vote well".
"Today, many of you will have the opportunity to make a choice. Your vote will affect billions of people around the world. You vote will affect countless of generations to come,” she wrote.
"Use it. Use it well. Every election is a climate election."
Since Election Day on Wednesday, Mr Trump has used Twitter to air false claims of voter fraud and to claim victory in several key battleground states where votes are still being counted.
There is no evidence of widespread voter fraud during the election, despite Mr Trump's repeated false claims.
Twitter has flagged several of his tweets for containing "potentially misleading claims about the election".
