Samuel Brent Oscar Riegel (born October 9, 1976) is a voice actor, writer and director who appears in many television cartoons, anime, and video games. He began as a child actor in theater in Virginia, and moved to New York City to perform in Broadway and off-Broadway shows. In 1994, he graduated from the Professional Children's School on the Upper West Side of Manhattan, New York City. After graduating from the University of Virginia in Charlottesville, VA, he returned to New York to begin his voice acting career. He now resides in Los Angeles, CA.
He is sometimes credited as Sam Regal, Sam Brent Regal, or Jack Lingo. He is the older brother of Eden Riegel and the younger brother of Tatiana S. Riegel.
He was in New York City on September 11, 2001, and he recorded the attacks on the World Trade Center with his video camera.
He is best known for his role of Donatello from Teenage Mutant Ninja Turtles (2003 series).