
Susan Alexandra "Sigourney" Weaver (born October 8, 1949) is an American actress. Weaver is considered to be a pioneer of action heroines in science fiction films. She is known for her role as Ellen Ripley in the Alien franchise, which earned her an Academy Award nomination in 1986 and is often regarded as one of the most significant female protagonists in cinema history.
A seven-time Golden Globe Award nominee, Weaver won both Best Actress in Drama and Best Supporting Actress in 1988 for her work in the films Gorillas in the Mist and Working Girl, becoming the first person to win two acting Golden Globes in the same year. She also received Academy Award nominations for both films. For her role in the film The Ice Storm (1997), she won the BAFTA Award for Best Actress ina Supporting Role. She also received a Tony Award nomination for her work in the 1984 Broadway play Hurlyburly.
Weaver's other film roles include Ghostbusters (1984), Ghostbusters II (1989), Dave (1993), Galaxy Quest (1999), Holes (2003), WALL-E (2008), Avatar (2009), Prayers for Bobby (2009), Paul (2011), The Cabin in the Woods (2012), and A Monster Calls (2016); and the television miniseries Political Animals (2012) and The Defenders (2017).
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Avatar: Fire and Ash
2025 · as Kiri

The Mandalorian and Grogu
2026 · as Colonel Ward

Avatar: The Way of Water
2022 · as Kiri

Avatar
2009 · as Dr. Grace Augustine

WALL·E
2008 · as Ship's Computer (voice)

Alien
1979 · as Ripley

The Gorge
2025 · as Bartholomew

Aliens
1986 · as Ripley

The Cabin in the Woods
2012 · as The Director

Chappie
2015 · as Michelle Bradley

Ghostbusters
2016 · as Rebecca Gorin

Finding Dory
2016 · as Sigourney Weaver (voice)

Ghostbusters
1984 · as Dana Barrett

Exodus: Gods and Kings
2014 · as Tuja

Alien Resurrection
1997 · as Ripley

Dust Bunny
2025 · as Laverne

Ghostbusters: Afterlife
2021 · as Dana Barrett

Paul
2011 · as The Big Guy