O'Connell plays Alistair in the Fox TV series Glee and starred as Shane in the award winning independent feature Life Inside Out. He is also known for his portrayal of the character Spencer (Twilight) in Columbia Pictures' Bad Teacher, had a recurring role on ABC's Modern Family and appeared in the premiere episode of Aquarius.
He is also the lead singer/songwriter of the band, The Slightlys. Their song, "Is There Anybody There" appeared in an episode of Switched At Birth.
|2013||Life Inside Out||Shane|
|2013-2014||Modern Family||Ronnie Jr./Singer||2 episodes|
|2014||Walking with Dinosaurs: Ultimate Dino Guide||Narrator||Video documentary short|
|2015||Glee||Alistair||Recurring (season six)|
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- He previously auditioned five times for five different characters.
- He began writing songs at the age of 12.
- The choir that Finneas' ex-girlfriend (Samantha Rubin) is in, is the choir that Glee is based on. Source
- He is the older brother of Billie Eilish.