He played the brooding Jasper Hale in The Twilight Saga alongside Robert Pattinson. His appearances in Criminal Minds, Hurt, and The O.C. earned him additional fame.
He was on the Disney show 411, where he interviewed stars such as Hilary Duff. He debuted as Jimmy in River's End in 2005.
He was in the band 100 Monkeys with his friends from high school.
His parents, Randee Lynn and Monroe Jackson Rathbone IV, had him in Singapore. He had a son on July 5, 2012 with his wife Sheila Hafsadi. In May of 2016, they welcomed a daughter named Presley Bowie.
He played the role of Sokka in The Last Airbender alongside Noah Ringer.