Jacqueline Mary Osborne (née Jossa; born 29 October 1992) is an English actress from Bexley, London, best known for playing Lauren Branning in the BBC soap opera EastEnders from 2010 to 2018. She won "Best Newcomer" at the National Television Awards 2012 and "Best Actress" at the Inside Soap Awards 2013.
Jossa was born in Bexley. She trained at D&B Theatre School in Bromley (where she performed the role Jeanie in 'Hair' to great acclaim), followed by the Royal Academy of Music in London. At music college her activities included performing the Bruch violin concerto. She has one older sister, Katrina. She is the cousin of former EastEnders actress Megan Jossa. She is half Irish from her mother who moved to England before Jossa was born.
Jossa was cast in EastEnders in 2010 as Lauren Branning, taking over from Madeline Duggan who played the role from 2006 to 2010. Jossa was "excited" to join the show, saying she has always been a fan. Her first appearance was on 27 September 2010. Jossa also appears in Lauren's internet spin-off series, Lauren's Diaries, with two series in 2010 and 2011.