Mark Fowler is a fictional character in the BBC soap opera EastEnders. Mark, an original regular character when the series started in February 1985, became a semi-regular after his original portrayer David Scarboro was written out of the role in April 1985. Scarboro made brief returns to the role in 1986 and 1987. Scarboro died by suicide in April 1988 and subsequently Mark was recast two years later on his return, with former Grange Hill regular Todd Carty taking on the role. From this point the character was a permanent fixture in the series and Carty remained in the role until the character was written out of the series in early 2003.

Arthur Fowler is a fictional character from the BBC soap opera EastEnders, played by Bill Treacher from 1985 to 1996.