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