List of famous people named Greg, along with photos. How many celebrities named Gregory can you think of? The famous Gregs below have many different professions, as this list includes notable actors named Gregory, athletes named Greg, and even political figures named Gregory. Did we forget your favorite famous person whose name is Greg? Add them to the list.Gregory Peck was a classic actor and one of the best in film history. One of his most memorable films include Roman Holiday, costarring with Audrey Hepburn. His most famous role as "Atticus Finch" in the film To Kill a Mockingbird earned him an Academy Award for Best Actor. Greg Maddux is a former baseball pitcher for the MLB. He played for the Chicago Cubs and Atlanta Braves. He was awarded the Cy Yound Award and is in the Baseball Hall of Fame.