Clark's other films include Love & Friendship (2016), Interlude in Prague (2017), and The Personal History of David Copperfield (2019).

Also on television, she played Mina Harker in Dracula (2020) and Sister Clara in His Dark Materials (2019).

[13] Her first acting experience was playing Mrs Dai Bread in a school production of Under Milk Wood.

[15] Clark left Drama Centre in her final term to star in Saunders Lewis's play Blodeuwedd with Theatr Genedlaethol Cymru.

[18] In 2016, Clark was named as one of the Screen International Stars of Tomorrow for her early work in television and theatre.

[28] Clark has cited that she is "proud" that being a Welsh speaker influenced her portrayal of her bilingual character, Galadriel.

"[29] She also mentioned enjoying speaking in Welsh on-set with co-stars Owain Arthur and Trystan Gravelle.