Danielle Jane Harmer (born 8 February 1989) is an English actress and television personality. She is best known for her lead role as Tracy Beaker in the CBBC series The Story of Tracy Beaker (2002–2006), Tracy Beaker Returns (2010–2012), for which she was nominated for a BAFTA in 2010, The Tracy Beaker Survival Files (2011–2012), My Mum Tracy Beaker, and The Beaker Girls (both 2021). Harmer played the role of Molly Louise Venables in the BBC One comedy series After You've Gone (2007), and starred in her own CBBC sitcom Dani's House (2008–2012) and its spin-off Dani's Castle (2013–2014).