Callum Scott Howells (born 29 April 1999) is a Welsh actor, singer, and television personality who began his career as a child. He is known for his role as Colin Morris-Jones in the Channel 4 drama It's a Sin (2021).

Early life and education
Howells was born in Pontypridd to parents Alison and Keith and grew up nearby in Tonyrefail and Porth. His grandfather, Bryn Howells, was a life member of the Treorchy Male Choir.

Callum attended Treorchy Comprehensive School, where he was head boy. He took classes with Rhondda Stage School, Superstars in the Making in Barry, and was a member of the National Youth Music Theatre. He was scouted by an agent when he was 16 and went on to train at the Royal Welsh College of Music & Drama, graduating in 2020.