Mad Men
Kids are often recast as they grow up and grow old, and it's usually for good reason. When Bobby Draper was on camera though, try taking a closer look. Tons of kids played the character, including the core four actors, Maxwell Huckabee, Aaron Hart, Jared Gilmore, and Mason Vale Cotton. Even weirder, every iteration of 'Bobby' had a different nickname on set.
Catwoman
Eartha Kitt was hired for the role of Catwoman shortly after Julie Newmar left her iconic role (and tight costume) to find a movie career."That character to me was so much fun. I was in dire need of tremendous help at that time, and like a starving cat, I had to find a way to survive" said Eartha of her memories there, "People recognized my name and still do because of Catwoman."