Phil Mitchell is a fictional character from the BBC soap opera EastEnders, played by Steve McFadden. He was introduced to the soap opera on 20 February 1990 and was followed by his brother Grant, sister Sam and mother Peggy. Phil was one of the major characters introduced by executive producer Michael Ferguson, who wanted to bring in some macho male leads. Phil and his brother Grant became popularly known as the Mitchell brothers in the British media, with Phil initially portrayed as the more level-headed of the two thugs. Storylines featuring the Mitchell family dominated the soap opera throughout the 1990s, with Phil serving as one of the show's central characters and protagonists since the 1990s. McFadden temporarily left the series in late 2003, then returned in April 2005 for a brief appearance before making a permanent return in October 2005, and has now overtaken Dot Cotton as the second-longest-serving character in EastEnders, surpassed only by original character Ian Beale. A teenage version of Phil, played by Daniel Delaney, appeared in a flashback episode broadcast on 5 September 2022, which focuses on the Mitchell family in the 1970s.

Sam Mitchell is a fictional character from the BBC soap opera EastEnders. The third member of the Mitchell family to appear on the soap, Sam was introduced as a 15-year-old schoolgirl in July 1990, originally played by Danniella Westbrook. Westbrook quit in 1993, but Sam reappeared from 1995 to 1996 and from 1999 to 2000. In both stints, Sam was written out earlier than the producers intended due to off-screen controversies surrounding Westbrook. In January 2002, Sam was introduced for a fourth time, but the role was recast to Kim Medcalf, who stayed in the role until November 2005. Diederick Santer later decided to reintroduce Sam for a brief stint in 2009 and opted to bring Westbrook back. Westbrook briefly reprised the role once again in 2016 for the funeral of Sam's mother Peggy Mitchell. In January 2022, it was announced that Sam would be returning to the show, this time played by Medcalf again. Medcalf’s return scenes aired on 18 April 2022. Medcalf took an extended break from the show in 2023, with Sam departing on 13 April 2023 and returning seven months later on 21 November 2023. On 18 January 2024, Sam made an unannounced departure from the show following Medcalf's decision to leave indefinitely.