Bríd Brennan (born 1955) is an Irish actress who is known for her film, TV and theatre work. She originated the role of Agnes in the Brian Friel play Dancing at Lughnasa, for which she won the 1992 Tony Award for Best Featured Actress in a Play. She is also a three-time Olivier Award nominee; for Rutherford and Son (1995), The Little Foxes (2002) and The Ferryman (2018).

As well as her roles in the films Maeve 1982, Anne Devlin 1984 and Mike Leigh's Four days in July 1985, Brennan reprised her role of Agnes in the 1998 film version of Dancing at Lughnasa, starring alongside Meryl Streep. Her television credits include Cracker: Brotherly Love (1995), South Riding (2011) and The Escape Artist (2013).