鄧不利多的軍隊
His first professional acting role was in the 2002 film adaptation of "Harry Potter and the Chamber of Secrets", in which he played wizard and Hogwarts student Justin Finch-Fletchley, a member of Hufflepuff and initially a friend of Harry's. His character is then threatened by a snake, under the presumed influence of Harry (who communicated in Parseltongue), and is later found petrified. Although Randell's character, a member of Dumbledore's Army, features over the course of the book series, Randell himself only appeared in the films once during the series, and the fate of the character in the film series is unknown.