Stacey Slater is a fictional character from the BBC soap opera EastEnders, portrayed by Lacey Turner. She first appears in episode 2826, originally broadcast on 1 November 2004. The character is introduced as a feisty and troublesome teenager and extension to the already established Slater family. She was created by scriptwriter Tony Jordan with Turner in mind. Producers explored the character's backstory with the introduction of her mother, Jean Slater, who has bipolar disorder. They then paired Stacey with Bradley Branning and writers developed a series of problems for their marriage, including an abortion and Stacey's scandalous affair with Bradley's father, Max Branning.

EastEnders is a British television soap opera created by Julia Smith and Tony Holland which has been broadcast on BBC One since February 1985. Set in the fictional borough of Walford in the East End of London, the programme follows the stories of local residents and their families as they go about their daily lives. Within eight months of the show's original launch, it had reached the number one spot in BARB's television ratings, and has consistently remained among the top-rated series in Britain. Four EastEnders episodes are listed in the all-time top 10 most-watched programmes in the UK, including the number one spot, when over 30 million watched the 1986 Christmas Day episode. EastEnders has been important in the history of British television drama, tackling many subjects that are considered to be controversial or taboo in British culture, and portraying a social life previously unseen on UK mainstream television.