Katie is shown to have lots of care and love for Ferris Bueller, especially when he gets "sick". And she is also known as motherly, rational, selfless, protective, benevolent, understanding, educated, loving, ladylike, encouraging, righteous, kind-hearted, affectionate, thoughtful, independent, even-tempered, bold, unswerving, efficient, low-key, loyal, empathetic and reasonable.
- Her name was originally supposed to be Joyce before the final version of the movie.
- Lyman Ward and Cindy Pickett, the actors of Ferris' parents, ended up getting married in real life after they met while filming Ferris Bueller's Day Off.
- However, they ended up getting divorced in 1992.