Paul Wesley, The Vampire Diaries
At the time of filming the first episode of The Vampire Diaries, Paul Wesley was 26 years old. At the time of filming the last episode, he was 35 years old. At the same time, his character Stefan Salvatore stopped growing old at the age of 17. It seems that the actor also possesses the secret of eternal youth because he managed to transform into the role of a teenager while being an adult man.