Amanda Michael Plummer (born March 23, 1957) is an American actress. She is known for her work on stage and for her roles in such films as Joe Versus the Volcano (1990), The Fisher King (1991), Pulp Fiction (1994) and The Hunger Games: Catching Fire (2013). Plummer won a Tony Award in 1982 for her performance in Agnes of God.

Plummer was born in New York City, the only child of Canadian actor Christopher Plummer and American actress Tammy Grimes. She attended Middlebury College for two and a half years, and as a young adult she studied acting at the Neighborhood Playhouse School of the Theatre in New York City.

Plummer has received critical acclaim for her film work, including such films as Cattle Annie and Little Britches (1981), The World According to Garp (1982), Daniel (1983) and The Hotel New Hampshire (1984). Other films of note include The Fisher King, for which she received a BAFTA film nomination (1992), a Chicago Film Critics Association Award nomination (1992), and a Los Angeles Film Critics Association Award (1992).

She played Dr. Theresa Givens in the revival series episodes "A Stitch in Time" and "Final Appeal". She won an Emmy Award for Outstanding Guest Actress in a Drama Series for her performance in the former episode.

Archive footage of her first appearance was later used in the clip show "Better Luck Next Time".