Emma Stone. Picture: Mario Anzuoni/Reuters

Emma Stone has revealed that she started having therapy for anxiety when she was just seven years old.

Stone, the world's highest paid actress, said she was a ‘very anxious child' and had a lot of panic attacks.

The Oscar winner said she feared she would never have been able to leave her native Arizona, but by 15 her anxiety was under control enough for her to move to Hollywood.

For an interview on The Late Show With Stephen Colbert, Stone, 28, brought along a drawing she had done in a therapy session as a nine year old.

‘I still have anxiety to this day but not panic attacks,' she said.

‘So I was nine and in therapy at that time, this is me with anxiety, who is a little green monster.

‘I was a very, very anxious child and I had a lot of panic attacks. I benefited in a big way from therapy – I started it at seven.' She added: ‘Acting and improvisation helped me so much.'

Earlier this year, Stone was named the year's highest-paid actress – with earnings of £20.2million.

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Stone spoke about her anxiety in May when she was part of a campaign with charity Child Mind Institute.

In a campaign video, she said: ‘It has always been something that I've lived with and that flares up in big ways at different times in my life. But sometimes when it's happening, when I'm in a phase of real turmoil or the anxiety is very strong, it feels like the anxiety is never going to end, and it does.'

She added she has managed the problem with ‘great therapists and great cognitive behavioural tools'.