Barbara Jane Horrocks (born 18 January 1964) is a British actress. She portrayed the roles of Bubble and Katy Grin in the BBC sitcom Absolutely Fabulous. She was nominated for the 1993 Olivier Award for Best Actress for the title role in the stage play The Rise and Fall of Little Voice, and received Golden Globe and BAFTA nominations for the role in the film version of Little Voice.

She is also known for her appearances in films, including The Dressmaker (1988), The Witches (1990), Second Best (1993), Life is Sweet (1990), Chicken Run (2000), Corpse Bride (2005), Sunshine on Leith (2013), Absolutely Fabulous: The Movie (2016), as well as the television series Fifi and the Flowertots (2005–2010), Little Princess (2006–2020), and the Sky One sitcom Trollied, as Julie Cook (2011–2015).