Ross Fleming Butler is a Singaporean-born American actor. He is best known for his role as Zach Dempsey in the Netflix series 13 Reasons Why and as Brett Willis on K.C. Undercover. He was also cast as Reggie Mantle in the Netflix/The CW show Riverdale, but left the role after one season due to filming commitments to 13 Reasons Why. In 2019, he joined the DC Extended Universe as Superhero Eugene Choi in the film Shazam!, and reprised the role in Shazam! Fury of the Gods in 2023.