Arthur got the role after casting agents came to his school looking for kids who looked the part of the characters they were casting.

When he auditioned he did not tell his parents until his mom received a letter coming from the casting crew of Harry Potter. Asking Arthur to come to London for more auditions. After a few more auditions and a photo shoot with Daniel Radcliffe, he was cast as Harry Potter's second child, Albus Severus Potter.

Since his appearance on Harry Potter and the Deathly Hallows part 2 Arthur has gotten a lot of praise from fans and now has over thirty thousand followers on twitter