The Harry Potter series has a significant number of characters, and some of the most important ones are the Hogwarts professors. Not only do these characters teach Harry most of what he knows about magic, but they become mentors, parental figures, and, eventually, allies against Lord Voldemort's dark rule. However, a lot of people might be wondering how old these characters really are since the books rarely talk about it.
Source：https://www.cbr.com/harry-potter-hogwarts-professor-age/
