Until well into adulthood, I assumed that Katherine Hepburn and Audrey Hepburn were mother and daughter. A few years ago, I overheard some TV documentary saying that Katherine Hepburn never had any children. They’re not related in any way. I was shocked.
Reminds me of when I was a kid watching Annie, I figured since it was set in the 1930s, it was filmed back then. I got really confused when I was a teenager and saw a rerun of the Carrol Burnett Show.