13 Actors Who Were Far Older Than Their Teenage Characters

4. Shirley Henderson - Harry Potter

Real age 37, Character Moaning Myrtle 15

With a huge 22 year age gap between Shirley and her ghostly character Moaning Myrtle, Henderson’s famously high pitched voice helps her convince audiences everywhere that she really is the ghost of a 15 year old Hogwarts student. Moaning Myrtle is perpetually stuck at 15 and with all 8 films spanning a total of 10 years, Henderson manages to not age a day.