Callan Ryan Claude McAuliffe (born 24 January 1995) is an Australian actor, known for his roles as Bryce Loski in Flipped and Sam Goode in I Am Number Four. He appeared as young Jay Gatsby in the 2013 film The Great Gatsby. From 2017 to 2022 he starred on The Walking Dead as Alden.

Early life
Callan McAuliffe is a native of the Sydney suburb of Clontarf. He is the son of Claudia Keech, and author and journalist Roger McAuliffe. His cousin is actress Jacinta John. Two of his grandparents were Irish.

McAuliffe attended Scots College, an all boys school in Bellevue Hill. He was the head chorister at the school and topped the London Trinity musical theatre exams, scoring a high distinction in 2008. He was a track athlete until he was injured, leading to a stronger focus on the performing arts.