Dakota Johnson suffered a panic attack whilst shooting 'Our Friend'.

Dakota Johnson

Dakota Johnson

The 31-year-old actress stars alongside Jason Segel and Casey Affleck in the comedy-drama film, but has admitted to suffering a little bit of stage fright ahead of shooting her first singing scene in the movie.

She said on 'The Tonight Show Starring Jimmy Fallon': "That was so scary. Singing in front of people is actually so terrifying for me. And we had to shoot the scene where you don't even really see me.

"The camera's in the back of ... you can't even really tell what's going on, and I was meant to be performing in community theatre. And they hit playback of my voice, my vocal recording, and called 'action'.

"And it was like I had a panic attack that manifested in all the ways that it does, that it can, so, like, I just took off running. Running, like around the theatre, around backstage.

"I was running around, and then just started laughing hysterically, and everyone on the crew's like, 'What's she doing?' Running around, laughing and then just stopped moving and started crying.

"It was like extreme flight mode."

Dakota is still perhaps best known for playing Anastasia Steele in the 'Fifty Shades' film series.

And the brunette beauty previously admitted that it was tough to shoot so many sex scenes for the movies.

Dakota - who starred in the franchise alongside Jamie Dornan - explained: "Shooting two films back to back, where the majority is the same, over and over, did get a little bit tedious.

"It became, 'How are we going to make this goddamn sex scene better than the other ones?' There's only so much you can do when the film is rated R. It was tricky."