Shirley Henderson as Moaning Myrtle in “Harry Potter and the Chamber of Secrets” (2002)

Okay, Moaning Myrtle (Shirley Henderson) may have already been dead for 50 years by the time that Harry Potter (Daniel Radcliffe) first interacted with her, but she still should have been the same 14-year-old girl she was when she died. Though Henderson’s look is deceiving, the actress was actually 37 years old in Harry Potter and the Chamber of Secrets – more than double Myrtle’s age. It is already weird that Myrtle hangs in a bathroom with underage students, but that makes it even worse.