Burt Ward as Grandfather Jonathan "John Hammond" Sparks - Hogwarts Mystery: The Stories of Levi Levine Fan Cast | myCast.io
Burt Ward
Age: 81
male
An American television actor and activist. He is best known for his portrayal of Robin in the television series Batman (1966–68) and its theatrical film spin-off.
Description above from the Wikipedia article Burt Ward, licensed under CC-BY-SA, full list of contributors on Wikipedia.
The stories of Levi Levine and his 7 Years at Hogwarts. Although featuring an all star-studded cast, it is a fanwork. I assume that all the voice recordings began in 2016 and ended in 2020.
