The following is a list of characters that first appeared in the British soap opera EastEnders in 2021, by order of first appearance. All characters are introduced by the show's senior executive producer, Kate Oates, and executive producer, Jon Sen. The first character to be introduced in 2021 is (Ben Freeman), who joined as part of a storyline involving Chelsea Fox (Zaraah Abrahams) and Lucas Johnson (Don Gilet). (James Farrar) made his debut in March, followed by Dana Monroe (Barbara Smith) and (Sue Holderness) in April. was then introduced (Gwen Taylor) in May. (Brian Conley) made his first appearance in May pretending to be Terry Cant, the father of Sonia Jackson (Natalie Cassidy); he is later confirmed to be the father of Dotty Cotton (Milly Zero). Dani Dyer guest-starred as in June and (Ross Boatman) made his debut in July. Kate Robbins was then cast in the guest role of music agent , making her first appearance in August. In October, Charlie Wernham and Heather Peace made their debuts as and , respectively, as well as , the child of (Kelsey Calladine-Smith) and Dennis Rickman (Bleu Landau). Additionally, multiple appear throughout the year.