Glee

The character of Kurt was written for Chris Colfer after he originally auditioned for the role of Artie. The writers told him that he looked like one of the Von Trapp kids, and Chris told them he actually just starred in The Sound of Music, playing Kurt Von Trapp. This obviously stuck in the writers' mind, as they called his character Kurt Hummel (the surname after the cherubic figurines).

The role of Quinn Fabray was not cast until the night before filming began.

Several times during filming they had to stop rolling to tell Kevin McHale to stop tapping his feet to the beat of the music.