Marcus St. James is a fictional character in the American comedy-drama series Ugly Betty and spin-off web-series Mode After Hours. He is played by Michael Urie.

Ugly Betty is an American comedy-drama television series developed by Silvio Horta that aired on ABC from September 28, 2006, to April 14, 2010. The series is based on Fernando Gaitán's Colombian telenovela Yo soy Betty, la fea, which has had many other international adaptations. It revolves the character Betty Suarez, who – despite her lack of style – lands a job at a prestigious fashion magazine. It was produced by Silent H, Ventanarosa, and Reveille Productions partnered with ABC Studios, with Salma Hayek, Horta, Ben Silverman, Jose Tamez, and Joel Fields serving as executive producers. The pilot was filmed in New York City; seasons one and two were filmed in Los Angeles and seasons three and four were filmed in New York City.