Sian Breckin (born 1982) is a British film, television and theatre actress. From 1993 to 1999, Breckin attended classes at the Roundhay School, and received A-Level in the field of drama. She went on to study theatre at the British drama school called East 15 Acting School, and as part of her drama graduate showcase she acted in the production of After Miss Julie by Patrick Marber.
Donkey Punch directed by Olly Blackburn was Breckin's feature film debut; she starred alongside Jaime Winstone, Nichola Burley, Tom Burke and Julian Morris. Subsequent television appearances included roles on series The Bill, Inspector George Gently, The Royal and Heartbeat.
Breckin acted in the film Tender directed by Deborah Haywood, and in Alice by filmmaker Marianne Elliott. She had guest starring roles on the television series Doctors and Casualty, and appeared as PC Janet Taylor in DCI Banks. She starred as Kelly in the 2011 film Tyrannosaur directed by Paddy Considine. Breckin had a recurring role as Deena Hardman on the Soap opera Hollyoaks in 2012. She and her fellow cast members of Hollyoaks helped to raise money for Centrepoint, a charity for the homeless.