Geek Girl Authority on X: Happy Birthday to Alexander Ludwig, a.k.a. Björn Lothbrok, a.k.a. Cato! #Vikings #TheHungerGames / X

Vikings fans thrilled as Alexander Ludwig announces next role, TV & Radio, Showbiz & TV

HD wallpaper: TV Show, Vikings, Alexander Ludwig, Bjorn Lothbrok, Katheryn Winnick

Alexander Ludwig Private Signing: Orders Due October 31st

Alexander Ludwig at event of Vikings (2013)

Alexander Ludwig Knows 'Vikings' Strength and Travis Fimmel's Weakness

Vikings' Finale Tests the Limits of Young Love (Exclusive Video)

Vikings 8 x 10 Photo Alexander Ludwig/Bjorn Lothbrok Handsome in Black w/Brown Belt kn at 's Entertainment Collectibles Store

Vikings Is Adding Some Hunger Games To It's Cast! Talk About Being Bjorn Again! Doh!

Alexander Ludwig chats about 'Vikings' and Bjorn Lothbrok

Vikings Is Adding Some Hunger Games To It's Cast! Talk About Being Bjorn Again! Doh!

Alexander Ludwig Height, Age, Bio - Creeto

Alexander Ludwig Height, Age, Bio - Creeto

What's 'Hunger Games' Star Alexander Ludwig up to These Days? Being a Tough-Guy Viking on TV, That's What

Vikings: Alexander Ludwig aka Bjorn Ironside turns 29

Happy birthday to Alexander Ludwig. Take a moment to thank him for playing Cato. : r/thehungergames