Sarah-Louise Barlow (also Platt, Tilsley and Grimshaw) is a fictional character from the British ITV soap opera Coronation Street. She was born on-screen during the episode broadcast on 2 February 1987. She was played by Leah King in 1987 and by Lynsay King from 1987 until 8 October 1999 when King opted to leave to focus on her education. Tina O'Brien took over the role on 31 October 1999; she opted to leave in 2007 and made her final on-screen appearance on 30 December 2007, although she made some brief voice-over appearances the following month. A number of false rumours about O'Brien returning to the role surfaced during her absence from the serial. In October 2014, it was announced that O'Brien would reprise the role, with Sarah returning on 30 March 2015. Sarah is the daughter of Gail (Helen Worth) and Brian Tilsley (Christopher Quinten), sister to Nick Tilsley (Warren Jackson, Adam Rickitt, Ben Price), half-sister to David Platt (Thomas Ormson, Jack P. Shepherd), granddaughter to Audrey Roberts (Sue Nicholls), Ted Page (Michael Byrne) and Bert (Peter Dudley) and Ivy Tilsley (Lynne Perrie) and mother to Bethany (Mia Cookson, Amy & Emily Walton, Lucy Fallon), Billy and Harry. Storylines 1987–2008 Sarah is born prematurely in February 1987 and questions are raised about her paternity, due to Gail's affair with Brian's cousin, Ian Latimer (Michael Loney) and Brian rejects Sarah, believing she was not his daughter, until a blood test reveals otherwise. Her birth reunites Gail and Brian after their divorce, however, Brian dies in February 1989 after being stabbed by a group of thugs. Gail then starts a relationship with Martin Platt (Sean Wilson), they had David together on Christmas Day 1990 and later married. Brian's mother, Ivy Tilsley (Lynne Perrie), tried to fight against Martin adopting Nick and Sarah as their names would change from Tilsley to Platt. Despite trying to fight the adoption, Nick and Sarah were allowed to be adopted. Gail and Martin's marriage eventually broke up a decade later. Sarah befriends Candice Stowe (Nikki Sanderson). After her 13th birthday in February 2000, Sarah discovers that she is five months pregnant. Her daughter Bethany Platt is born in June 2000. Bethany's father, Neil Fearns (Paul Holowaty), has no interest in his daughter, but when Neil dies in a car crash in September 2003, Sarah takes Bethany to his funeral and makes friends with Neil's mother, Brenda Fearns