This article is about the English actor and singer. For the Irish fiddler, see Sean McGuire (fiddler).

Sean Martin Michael Maguire (born 18 April 1976, Ilford, Essex) is an English actor and singer, who rose to fame in 1988 when at the age of 11 he took on the role of "Tegs" Ratcliffe on the BBC children's drama Grange Hill, in which he remained until 1992. For a short time after leaving Grange Hill, he played Aidan Brosnan in EastEnders.

He has appeared in several feature films and had moderate success as a singer as well. He is also known in the US for his roles as Donovan Brink in the UPN sitcom Eve, and as Kyle Lendo in the CBS sitcom The Class.