Gigantic cast, including all of the TV shows Gigantic actors and actresses with photos and actor bios (7 Items). This full list of the cast of Gigantic covers Season 1 on, including all Gigantic cast members. If you are wondering, "What are the Gigantic actors' names?" or "Who starred on Gigantic?" you can sort this alphabetical list by Gigantic characters and their pictures. List features items like Malcolm David Kelley and Jolene Purdy. Click any actor's name to read more information. This list includes the casts of all Gigantic episodes.