As an actress, she is best known for playing Lavender Brown in the Harry Potter film series. As a comic she has made a number of online videos for her Pindippy website, as well as a series with Simon Amstell, encouraging him to engage with social media.She appeared in the final episode of Grandma's House alongside Amstell, playing the character of Zazzy.

She made her Edinburgh Fringe debut with Bookworm in 2012.