|Birth Name||Lyle O'Donohoe|
|Date of Birth||September 25, 1994|
|Place of Birth||Flesherton, Ontario, Canada|
Lyle O'Donohoe Lettau is an actor portraying Tristan, a new freshman, in the second part of Season 11 of Degrassi. He is known for portraying "The Brain" in the most recent episodes of the TV show, Arthur. He is currently a senior at Flesherton's Grey Highlands Secondary School. His inspirations are Marilyn Monroe, Andy Warhol, and Lady Gaga. His Twitter can be found here.
- Lyle is a Libra.
- He ships Eclare (Eli and Clare).
- He had wanted to be on Degrassi since he was ten years old.
- His favourite Degrassi characters are Darcy and Manny.
- He hates trying on clothes, and says wardrobe fittings are the only part of the job he doesn't like.
- He is a huge fan of Lady Gaga.
- He ships Camaya (Cam and Maya).
- He originally auditioned for Mo before landing the part of Tristan.
- His favorite band is No Doubt.
- He is a big fan of Quentin Tarantino.
- He doesn't like The Big Bang Theory.
- He loves American Horror Story.
- He has 3 dogs.
- He does not like Ashley Kerwin and rolls his eyes whenever she was on-screen.
- Ironically, he is best friends with Alex Steele like his character Tristan Milligan is best friends with her character Tori Santamaria.
- He dyed his hair blonde.
- On June 12th, 2013, he revealed on Tumblr that he has decided to go by Lyle Lettau rather than O'Donohoe in honor of his grandmother and would be credited as such in the 13th season of Degrassi and onwards.