Leisa Gwenllian

Leisa Gwenllian is a bilingual Welsh actress.

Early life and education Gwenllian was born and brought up in North Wales. Her mother is Beca Brown, a Plaid Cymru member of the Senedd. She credits eisteddfods with giving her opportunities to gain confidence at performing in public through competitions in recitation, monologues and choral singing. She studied at Canolfan Gerdd William Mathias in North Wales and later trained at the Oxford School of Drama, graduating in 2024. She has been a voice actor in several animation productions from Sain and other companies.

Gwenllian made her first film appearance with the part of Lois in the film On the Sea (2025), followed by the maid Clara in Madfabulous (2026). However, her first leading role was in Effi o Blaenau (2026). She received praise for her performance as Effi in this Welsh-language film adaptation directed by Marc Evans from Gary Owen's one-woman play Iphigenia in Splott. Her portrayal of Effi was described as "remarkable", portraying a young woman shaped by poverty and neglect in the dramatic post-industrial landscape of Blaenau Ffestiniog and North Wales.

Filmography Film

Television