Climate activist Greta Thunberg has changed her Twitter bio to mock US President Donald Trump's outrage at her winning Time Person of the Year 2019.

He said she had an "anger management problem" and should go to "a good old fashioned movie with a friend".

"Chill Greta, Chill!" he added.

She then adapted her Twitter bio to say she was "a teenager working on her anger management problem. Currently chilling and watching a good old fashioned movie with a friend".

This is not the first time she has changed her Twitter bio to reflect Mr Trump and other leaders' criticism of her.

On Tuesday Ms Thunberg changed her bio to "pirralha" - the Portuguese word for brat - after Brazilian President Jair Bolsonaro criticised her highlighting the plight of Brazil's indigenous people.

"Greta's been saying Indians have died because they were defending the Amazon," Mr Bolsonaro told reporters. "It's amazing how much space the press gives this kind of pirralha."