Katla features several breakout stars, so how do you know the main performers? The June 2021 Netflix release follows the lives of villagers in Vík, Iceland who recover from the eruption of Katla, a subglacial volcano. When duplicates of missing townspeople covered in ash emerge from the titular location, several community members must grapple with trauma from the past.

Created by Sigurjón Kjartansson and Baltasar Kormákur, Katla season 1 centers on the life experiences of Vík resident Gríma. Her sister Ása disappeared one year prior to the volcanic eruption before returning with no memory of what happened. The siblings' father, Þór, also struggles to process the return of a former lover named Gunhild, who emerges out of the ash as a young woman, and then again as her real self. In a subplot, a volcanologist and his wife are stunned by the reappearance of their son, who passed away three years prior from a fractured skull. Overall, Katla season 1 deals with themes of grief and mental illness.

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Katla's main cast includes an actor named Þorsteinn Bachmann, who previously appeared in the 2017 DCEU movie Justice League. Like all the main players, though, he may not be easily identifiable by casual Netflix streamers. Here's a complete cast and character rundown for Katla season 1, including details on the main players and their past roles.

Guðrún Ýr Eyfjörð As Gríma

Guðrún Ýr Eyfjörð as Grima in Katla on Netflix

Guðrún Ýr Eyfjörð stars as Gríma, a married Icelandic woman who suffers a mental breakdown after the disappearance of her sister, Ása. When the sibling returns covered in ash, Gríma tries to understand the meaning behind it. She also comes face-to-face with a happier version of herself. Eyfjörð makes her TV debut in the 2021 Netflix show, Katla. She also headlines Erlendur Sveinsson's 2021 short movie Flýg Upp x Varlega.

Íris Tanja Flygenring As Ása

Íris Tanja Flygenring as Ása in Katla on Netflix

Íris Tanja Flygenring co-stars as Ása, Gríma's free-spirited sister who returns after a prolonged disappearance. She doesn't seem that interested in learning what happened to her in the past, but then reaches an epiphany after a medical report confirms the real Ása's death. The character exists to serve a purpose, one that helps Gríma move forward with her life. Flygenring portrayed Vera in the 2017 series Fangar and Fenella in the 2020 movie Iceland Is Best.

Ingvar Sigurdsson As Þór

Ingvar Sigurdsson as Þór in Katla on Netflix

Ingvar Sigurdsson portrays Þór, the father of Gríma and Ása. He is stunned by his daughter's reappearance, but even more by the presence of Gunhild - a younger version of the woman he had an affair with 20 years prior. Sigurdsson portrayed Mayor in the DCEU's Justice League and Anatoli Boukreev in the 2015 movie Everest.

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Aliette Opheim As Gunhild

Aliette Opheim as Gunhild in Katla on Netflix

Aliette Opheim appears as Gunhild, a Swedish woman who emerges covered in volcanic ash. Opheim also plays an older version of the character who travels to Iceland from Sweden. She reunites with Þór and feels guilty about a failed abortion, which affected the brain activity of her son. The younger version of Gunhild helps the real version cope with her past decisions. By the end, the older character trusts her son to form a relationship with his father, Þór. Opheim portrayed Detective Agathe Albans in Patriot and Mira Andersson in the HBO Max show Beartown.

Katla's Supporting Cast & Characters

Katla Season 1 on Netflix

Þorsteinn Bachmann (above, grey beard) as Gísli: A religious detective who treats his sick wife while plotting to live with her double. Bachmann portrayed Móri in Life in a Fishbowl and Sigurður Guðmundsson in Trapped.

Sólveig Arnarsdóttir as Magnea: Gísli's sick wife who is shocked by the appearance of a younger version of herself. Sólveig Arnarsdóttir starred as the title character in the 1992 movie Ingaló and portrayed Halla in Trapped.

Björn Thors as Darri: A volcanologist who struggles with the reappearance of his dead son, one who is incredibly violent. Björn Thors portrayed and Hugi in Paris of the North and Arnar in The Valhalla Murders (another 2020 Netflix TV show).

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Birgitta Birgisdóttir as Rakel: Darri's wife who tries to abandon the ash version of her son and decides that he was created based on her own thoughts. Birgitta Birgisdóttir portrayed Guðný in The Valhalla Murders.

Katla also features supporting performances from Haraldur Stefansson, Sólveig Arnarsdóttir, Baltasar Breki Samper, and Aldís Amah Hamilton.

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