Brie Larson has revealed how she accidentally found herself in Kylie Jenner's Met Gala selfie.

Brie Larson in Kylie Jenner's 2017  Met Gala selfie

Brie Larson in Kylie Jenner's 2017 Met Gala selfie

The 30-year-old Oscar winner was washing her hands in the bathroom at the star-studded event in 2017 when Kylie, her sisters Kendall Jenner and Kim Kardashian West and a bevy of famous pals swept in and began preparing for their epic selfie.

Speaking to host Sean Evans on 'Hot Ones', Brie - who is asthmatic - explained: "Oh my gosh! So, the Met Ball bathroom is pretty notorious. It's, like, where all the cool kids hang out. I had been to Met Ball like three times and I had never gone to the bathroom because sometimes people smoke in there.

"My goal was to get in and out as quick as possible. I was trying to hold my breath as much as I could in there because I didn't want to deal with the smoke."

As Kylie and her pals began preparing for the selfie, Brie panicked about being in a picture with celebrities she didn't know but eventually grinned awkwardly for the snap.

She said: "One of the people from the photo turned to me and was like, 'You need to chill and just be here'.

"And I was like, 'Okay!' I smiled [for the selfie] in a way that was like, 'I'm panicked because I don't know if I'm in this or not. I am truly here only because I washed my hands.

'Is my publicist going to be upset about this? Like, I don't know any of these people'. By the time I walked back to my chair it was done. It had happened and I don't hate it. I think it's pretty funny."