Alexander Richard Ludwig is a Canadian actor and country musician. He first began his career as a child, and then received recognition as a teenager for starring in the films The Seeker: The Dark Is Rising (2007) and Race to Witch Mountain (2009). He is also known for starring as Cato in The Hunger Games (2012).

The Seeker is a 2007 American family drama-fantasy film, a very loose film adaptation of the children's fantasy novel The Dark Is Rising (1973) by Susan Cooper. The film is directed by David L. Cunningham and stars Ian McShane, Alexander Ludwig, Frances Conroy, Gregory Smith, and Christopher Eccleston as the Rider. The film centers on Will Stanton (Ludwig), when on his 14th birthday, he finds out that he is the last of a group of warriors – The Light – who have spent their lives fighting against evil – The Dark. Will travels through time to track down the signs that will enable him to confront the evil forces. The Dark is personified by The Rider (Eccleston).