Alexander Ludwig: roles at a glance
Alexander Ludwig plays Bjorn Ironside in the original Vikings series.
Selected work beyond Vikings includes The Seeker: The Dark Is Rising, The Hunger Games and Race to Witch Mountain. Explore the biography below for the roles, career context and further references.
Reference: Vikings cast credit.
About Alexander Ludwig
Ludwig grew up in Vancouver and started acting in commercials and television as a child. He played Will Stanton in The Seeker: The Dark Is Rising and Cato in The Hunger Games. His other films include Race to Witch Mountain and Lone Survivor.
Ludwig’s work before and after Bjorn spans young-adult fantasy, ensemble action and television drama. The Hunger Games gives a concise view of him as Cato; Heels offers the longer character arc of Ace Spade. His work as Dorn in Bad Boys for Life moves into a different action ensemble. These are useful next steps for seeing how he works away from the burden of Bjorn’s inherited reputation.
What to watch next from Alexander Ludwig
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Heels
Start here for an extended television character arc as Ace Spade.
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A compact contrast with Bjorn: Ludwig plays Cato in the first film.
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Choose this to see him as Dorn in a contemporary action ensemble.
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Selected screen credits
Playing Bjorn Ironside: performance & interviews
Watching the performance
The older Bjorn is interesting to watch as someone who has inherited a legend before having a chance to create one. Ludwig’s more imposing physical presence signals the passage into adulthood, while the character’s decisions continue to invite comparison with both parents. The change of performer is a change in the character’s age, rather than evidence that two different characters share the name.
Earth Abides gives Alexander Ludwig a post-apocalyptic lead role
Ludwig plays Ish in MGM+’s adaptation of George R. Stewart’s Earth Abides, following survivors after a devastating plague. The studio’s media kit records the UK launch as January 11, 2025, following the US launch on December 1, 2024. For Bjorn viewers, it is a change from inherited kingship to the practical challenge of keeping a community alive.
Explore the project · More cast projectsAlexander Ludwig in Vikings
Bjorn Ironside
Alexander Ludwig portrays Bjorn Ironside in Vikings.
Bjorn begins as Ragnar and Lagertha’s son, watching adult power from the edge of the hall. His development turns the inheritance of a famous name into a practical burden.
Follow the character’s journey, loyalties and place in the wider saga.
Explore Bjorn Ironside’s storyAlexander Ludwig: portrait & roles
Fan questions
Who plays young Bjorn?
Nathan O’Toole plays the younger Bjorn. His January 2014 RTÉ interview identifies the role and discusses the hair and eyebrow changes used for filming.