[4] While deferring her acceptance to UCL,[5] Oparah was cast in the BBC Three Doctor Who spin-off Class as Tanya Adeola, marking her television debut.
When she auditioned she only knew that the series was linked to the Doctor Who universe, but she did not imagine that it was such a big production until she got the job and started filming.
[10][11] In 2018, Oparah reprised her role as Tanya in six audio plays by Big Finish[12] and made her feature film debut in Teen Spirit.
She starred opposite David Jonsson in the romantic comedy Rye Lane, which opened at the 2023 Sundance Film Festival to critical acclaim.
She has an upcoming lead role opposite Bilal Hasna in the Amazon Prime comedy thriller series Dead Hot.