He is best known for his recurring role as "young Jacob" on the final season of the ABC primetime drama, Lost, and for his co-starring role as the flamboyant European exchange student, Gunther Hessenheffer on the Disney Channel comedy series, Shake It Up, and Matt Prylek in the anti-bullying movie, Contest.

[2][3][4][5] Duty first began studying acting at the age of 9, when his parents suggested he attend a musical theatre workshop to help him feel comfortable in front of an audience for school presentations.

[6][7] It was at the summer workshop that he discovered he had a love for musical theatre, and it was there that he would also meet the casting director who would ask him to audition for his first play, A Christmas Carol.

[10][11] In 2007, after several appearances in comedy sketches on The Tonight Show with Jay Leno, Duty landed his first featured role as Michael in the Lifetime television movie, Christmas in Paradise.

[12][13][14][15][16] The glitzy brother/sister duo of Gunther and Tinka is said to be inspired by Ryan and Sharpay Evans of Disney's High School Musical franchise.

The best performances are from Caroline Sunshine and Kenton Duty as an overbearing brother-and-sister act from abroad named Tinka and Gunther.

Not long after his departure from Shake It Up, Duty began work on the films Contest, Silver Bells and the short, Murphy.

[10][21][24] Before beginning work on the TV series Shake It Up!, Duty played guitar and sang in the band KGMC Gigmasters with Braeden Lemasters and fellow Lost co-star Dylan Minnette.