Trivia

His audition tape for the role of Elvis Presley in Elvis (2022), he sang an emotional performance of "Unchained Melody". Director Baz Luhrmann was so moved and impressed with his audition that he gave the role to Austin.

He plays guitar and piano.

Was in a relationship with High School Musical actress Vanessa Hudgens [2011-2019].

He was approached by a representative from a background-acting management company, who helped him get started in the entertainment industry in 2005.

His maternal great-grandmother was the daughter of Finnish parents, from Saukonkylä, Alajärvi and Utajärvi, respectively. Austin's other roots are English, as well as Scots-Irish/Northern Irish, German, Scottish, Welsh, and distant Swiss-German and Swedish.

He is good friends with Ashley Tisdale, Lindsey Shaw, Alexa PenaVega, Carter Jenkins and Lucy Hale.

Portrays Manson family member and Sharon Tate's murderer Tex Watson in Había una vez en Hollywood (2019), and Elvis Presley right next in Elvis (2022) - which depicts the King's shock and anxieties related to his safety following the brutal murder of Tate.

His friend, Lindsey Shaw, introduced him to her manager, who offered to represent him, starting from that day till now he is being represented by the same manager.

He was the ring bearer at Alexa PenaVega and Sean Covel's wedding.

Was invited to join the actor's branch of the Academy of Motion Picture Arts & Sciences in 2023.

His older sister, Ashley, got to do some background acting with him in Manual de supervivencia escolar de Ned (2004).

Butler made his Broadway debut in the 2018 revival of The Iceman Cometh.

Longtime acting mentor is Larry Moss.

He has appeared in three films that have been nominated for the Best Picture Oscar: Había una vez en Hollywood (2019), Elvis (2022) and Duna: Parte Dos (2024).