Greenland Cast & Character Guide
Mia Lopez
Published Mar 29, 2026
Who stars in Greenland and where have you seen them before? Take a look at our cast and character guide for the 2020 end-of-days disaster movie.
Who stars in Greenland and where have you seen the cast before? The 2020 end-of-days blockbuster was directed by Ric Roman Waugh, who reunites with his leading man from Angel Has Fallen. The storyline centers on a family who is separated after a comet strikes Earth.
In Greenland, skyscraper engineer John Garrity attempts to repair a broken relationship with his wife Allison. The couple have a son named Nathan, who suffers from diabetes. When a comet strikes central Florida, the U.S. government offers to relocate the Garrity family to a Georgia shelter. However, John is accidentally separated from Allison and Nathan, and he must find a new way to protect his family before a nine-mile comet fragment wipes away an estimated 75 percent of plant and animal life on Earth. Greenland released in December 2020, and will eventually be available on HBO Max.
The Greenland cast features a Scottish action star in the main role, along with an actress who headlined Firefly and reprised her role in the feature film Serenity. In a supporting role, a former cast member of The Office plays a morally righteous survivor, while a character from To All the Boys I Loved Before portrays a man with intel about the titular destination. Here's a complete cast and character guide for Greenland, a 2020 disaster movie.
Gerard Butler As John Garrity
Gerard Butler star as John Garrity, a skyscraper engineer with government connections. When a comet hits Earth, John dedicates himself to protecting his wife and son at all costs.
Butler starred as King Leonidas in 300 and "Big Nick" O'Brien in Den of Thieves. He also portrays Mike Banning in the "Fallen" movie franchise (Olympus Has Fallen, London Has Fallen, Angel Has Fallen).
Morena Baccarin As Allison Garrity
Morena Baccarin co-stars as Allison Garrity, John's wife who agrees to re-build their marriage after a cheating incident.
Baccarin is best known for portraying Vanessa in Deadpool and Deadpool 2. Previously, she starred as Inara Serra in Firefly and Anna in ABC's V reboot. Baccarin also voices Gideon in The Flash.
The Greenland Supporting Cast
Scott Glenn (Above) as Dale: Allison's stubborn father who lives in Lexington, Kentucky. Scott Glenn portrayed Bart Mancuso in The Hunt for Red October and Jack Crawford in The Silence of the Lambs. Most recently, he portrayed Stick in Daredevil, Kevin Garvey, Sr. in The Leftovers, and Alan Pangborn in Castle Rock.
Roger Dale Floyd as Nathan Garrity: John and Allison's son who suffers from diabetes. Roger Dale Floyd portrayed Young Danny in Doctor Sleep and Young Elton Ortiz in The Walking Dead: World Beyond.
David Denman as Ralph Vento: A man who agrees to drive Allison and Nathan to Knoxville. David Denman portrayed Roy Anderson in The Office and Mark Holder in Outcast. He also appeared as Kyle Breyer in Brightburn.
Hope Davis as Judy Vento: Ralph's wife. Hope Davis portrayed Nina Howard in The Newsroom and Maria Stark in Captain America: Civil War. She currently appears as Claudia Hoffman in Love Life and Gina Baxter in Your Honor.
Andrew Bachelor as Colin: A survivor who informs John about a shelter in Greenland. Andrew Bachelor portrayed John in The Babysitter, Greg in To All the Boys I've Loved Before, and Neil in Holidate.
Scott Poythress as Kenny Jones: John and Allison's friend. Scott Poythress portrayed Dr. Thatcher in TURN: Washington's Spies and Steve in I Trapped the Devil. He has also appeared in The Accountant and Homeland.
Holt McCallany as Twin Otter Pilot: A civilian pilot who assists survivors. Holt McCallany is best known for starring as Bill Tench in Mindhunter. He also portrayed The Mechanic in Fight Club and Patrick "Lights" Leary in Lights Out.
Gary Weeks as Ed Pruitt: John and Allison's neighbor. Gary Weeks portrayed Agent Foster in Spider-Man: Homecoming and Luke in Outer Banks.
Tracey Bonner as Peggy Pruitt: Ed's wife. Tracey Bonner portrayed Sharon in Den of Thieves and Lawanda White in Black Lightning. She recently appeared as Pastor June Wilkes in Sweet Magnolias.
Merrin Dungey as Major Breen: A military figure in Greenland who explains to Allison that the majority of armed service members weren't selected for the emergency location. Merrin Dungey portrayed Kelly Palmer in The King of Queens and Francie Calfo in Alias. She also appeared as Detective Adrienne Quinlan in Big Little Lies.
