Sebastian Theodore Kemble Croft (born 16 December 2001) is an English actor, singer and songwriter. He began his career as a child actor on stage before making his television debut as Young Ned Stark in Game of Thrones (2016).[1] He earned a BAFTA Children's Award nomination for his role in Horrible Histories: The Movie – Rotten Romans (2019).[2][3] He has since starred in the Netflix series Heartstopper (2022–2023).