She gained prominence through her role as Jing Hua in Bad Education[2] and its spinoff film.

She played Leaf in the sixth season of Game of Thrones, Linh Xuan Huy in the BBC Two drama Collateral,[3] and Min Farshaw in the Amazon Prime series The Wheel of Time.

[5][6] In 2019, she was selected for the British Academy of Film and Television Arts's Initiative program.

[8] Alexander was interested in dance as a teenager and participated in Pineapple Studios classes.

She developed an interest in acting through an open house at the BRIT School her friend took her to.