| Before he/she was on Glee, he/she... | Actor | Character on Glee |
| ...auditioned for American Idol. | |
| ...wrote, directed, and starred in a short film. | |
| ...played a character in a musical who his character on Glee is named after. | |
| ...dropped out of high school as a freshman. | |
| ...played a character who was a part of a love triangle that included Betty Suarez. | |
| ...was represented by an agent before she even turned a year old. | |
| ...toured with The Second City. | |
| | Before he/she was on Glee, he/she... | Actor | Character on Glee |
| ...appeared on an episode of 'The Office.' | |
| ...played a character who got killed off on a different show created by a Glee producer. | |
| ...sang, wrote, and played guitar in a solo album under the stage name Jericho. | |
| ...played a sexually repressed teenager on Broadway. | |
| ...was a backup dancer for Beyoncé. | |
| ...appeared in her first Broadway show, a revival of A King and I. | |
| ...was in a boy band. | |
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