Greta Thunberg says she wasn't surprised by Donald Trump's sarcastic response to her impassioned speech on climate change this week.
"Of course he was going to write that," she told a Scandinavian talk show on Wednesday.
"You can interpret it (the tweet) in many different ways, but I knew that at some time he was probably going to say something about me."
The US President tweeted that Ms Thunberg seemed like a "very happy young girl looking forward to a bright and wonderful future", following her speech at the United Nations summit on climate change on Tuesday.
During the address, Ms Thunberg became visibly emotional as she urged world leaders to do more to combat global warming.