Llewelyn is from Wick, South Wales, UK. He got into dancing through gymnastics and with a connection to a local theatre school, learning dancing, singing and acting.

He joined the National Dance Company of Wales Associates Programme at the age of 13 then moved on to Rambert School where he graduated in June 2021.

Llewelyn joined Motionhouse in June 2021 and has performed in Captive, Gravity, Knot, Nobody, Starchitects, Starchitects Save Santa!, WILD and Wondrous Stories.