probably not strictly to do with the question but I was always shocked watching things like 'friends' when the characters were supposed to be in their early to mid twenties and I just saw them as thirties - forties. Same for How I met your mother. And Penny on the Big Bang theory, when they mention the character's ages as 22, or 27, I'm like 'What? And the rest...?'
Kayley Cuoco (Penny) was
22 when TBBT began. She's only 28 now.