Sydney-Leigh Martin (born 18 October 2001) is an English actress, known for portraying the role of Betsy Swain on the ITV soap opera Coronation Street since 2024.
Sydney-Leigh Martin was born on 18 October 2001 in Bury, Greater Manchester. Prior to acting, Martin worked in Tesco and handed her notice in after landing her role in Coronation Street. She also appeared as Guardian Ganton in the feature film Assassin's Guild.
In June 2024, Martin joined the cast of ITV soap opera Coronation Street as Betsy Swain. Her character was initially introduced as an unnamed friend of Sabrina Adetiba (Luana Santos). She was subsequently established as the daughter of DS Lisa Swain (Vicky Myers). Since joining the soap, her storylines have included her character blackmailing Joel Deering (Calum Lill) and the discovery that her mother Becky Swain (Amy Cudden) is still alive after believing her to be dead. In 2025, she appeared in a short film Through the Eyes of Bairns as a young adult Rose. In 2026, she is set to appear in a short film titled Favourite alongside Hollyoaks actress Isabelle Smith.