The actor appeared as Arya Stark in all eight series of the hit fantasy drama, which came to a divisive end in 2019.
The Game Of Thrones actor broke down in tears as she recalled an incident at school when she was eight.
The Game Of Thrones star said she was "washing [her] head with facewash" after chopping off her locks.
"I thought that Arya was queer, you know?"
The actor was cast as Arya Stark a few months after her 12th birthday in 2009.
The actor, who played Gendry, has also admitted he has "sympathy" for those upset with the final episode.
Arya Stark's big scene almost went to a different character entirely.
"I just sort of zoned out," the Arya Stark star admitted during a recent interview.
While many fans were disappointed with how things turned out, Maisie is definitely not one of them.
The singer has knocked Adele off the top of Heat magazine's Rich List.