Tim Allen plays Jason Nesmith (Commander Peter Quincy Taggart), Sigourney Weaver plays Gwen DeMarco (Lt. Tawny Madison), and Alan Rickman plays Alexander Dane (Dr. Lazarus) in the comedy ‘Galaxy Quest‘.
Main cast
- Jason Nesmith / Commander Peter Quincy TaggartTim AllenMain
- Gwen DeMarco / Lt. Tawny MadisonSigourney WeaverMain
- Alexander Dane / Dr. LazarusAlan RickmanMain
- Fred Kwan / Tech Sergeant ChenTony ShalhoubMain
- Tommy Webber / Lt. LaredoDaryl MitchellMain
- Guy Fleegman / ‘Crewman #6’Sam RockwellMain
Supporting cast
- MathesarEnrico ColantoniSupp
- LaliariMissi PyleSupp
- QuellekJustin LongSupp
- Jason Nesmith’s WifeHeidi SwedbergSupp
- Dr. LapierreRainn WilsonSupp
Guest & voice
- SarrisRobin SachsGuest
- Thermian CommanderPatrick BreenGuest
- BrandonCorbin BleuGuest
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About this cast
Galaxy Quest is a 1999 science‑fiction comedy film. It follows the washed‑up cast of a cult TV show who are taken on a real space adventure by aliens who believe the series is a historical document. The film stars Tim Allen, Sigourney Weaver, and Alan Rickman as the fictional actors, with a strong ensemble supporting cast.
FAQs
Who plays the lead role of Jason Nesmith in Galaxy Quest?
Tim Allen plays Jason Nesmith, the actor who plays Commander Peter Quincy Taggart.
Is Galaxy Quest based on a real TV show?
No, Galaxy Quest is a fictional film about a fictional TV series, though it parodies Star Trek and its fandom.
Who plays the character of Gwen DeMarco in Galaxy Quest?
Sigourney Weaver plays Gwen DeMarco, the actor who plays Lt. Tawny Madison.
Who plays the alien leader Mathesar in Galaxy Quest?
Enrico Colantoni plays Mathesar, the leader of the Thermian aliens.
Was Galaxy Quest a box office success?
Galaxy Quest grossed about $90 million worldwide on a $45 million budget, and became a cult classic.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026