Robert Gant is an American actor. His Hollywood career started in the mid-1990s. During his beginnings, he mostly had guest appearances on many television shows. His first notable role was as Trevor in Caroline in the City. In the 2000s, he became further known for his role as Principal Calvin Krupps in the show Popular. His major breakthrough was in the show Queer as Folk where he played the role of Professor Ben Bruckner. During this period, he also appeared in the film Save Me. He later appeared as Rock van Gelder in five episodes of Personal Affairs. More recently, he played Zor-El in Supergirl and Todd Crimsen in 13 Reasons Why.