Mariah Rose Faith Casillas
Biography
Mariah Rose Faith is a trained actress, singer, songwriter, and filmmaker who has found success in musical theater and film. She first gained public attention on YouTube for her musical theater song covers. Faith is known for her roles as Regina George in the first national tour of Mean Girls and her work with the comedy theater group Team Starkid. She has trained with acting and vocal coaches in Los Angeles and collaborated with award-winning creatives.
Known For
The Guy Who Didn't Like Musicals: Reprised!
Melissa/Zoey Chambers/Harmony Jones/Alice Woodward/Doug
Nerdy Prudes Must Die
Steph Lauter, Caitlyn
The Guy Who Didn't Like Musicals
The Guy Who Didn't Like Musicals (2025 Remount)
Melissa/Zoey/Alice
The Guy Who Didn't Like Musicals
Alice / Zoey
The Guy Who Didn't Like Musicals: Reprised!
Melissa / Zoey / Alice / Greenpeace Girl
Artists On Artists On Artists On Artists
Genevieve Peters
Dirty Laundry
Self - Guest
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Filmography
Acting (30)
Movies (22)
The Guy Who Didn't Like Musicals (2025 Remount)
2026as Melissa/Zoey/Alice
The Guy Who Didn't Like Musicals: Reprised!
2026as Melissa / Zoey / Alice / Greenpeace Girl
The Return of TGWDLM!
2026as Self
We’re All Gonna Die: A DREAD Actual Play Experience
2025as Evangeline Walker
The Guy Who Didn't Like Musicals: Reprised!
2025as Melissa/Zoey Chambers/Harmony Jones/Alice Woodward/Doug
The Guy Who Didn't Like Musicals: Reprised!
2025as Alice Woodward/Zoey Chambers
Cinderella's Castle
2025as Putrice Ashmore/Justine Grizzwald/Ensemble(as Mariah Rose Faith Casillas)
The Great Debate - Tweeters Vs. Tik Tokers
2025as Self
Nerdy Prudes Must Die
2023as Stephanie Lauter/Caitlyn
Nerdy Prudes Must Die
2023as Stephanie Lauter/ Caitlyn
Nerdy Prudes Must Die
2023as Steph Lauter, Caitlyn
Nerdy Prudes Must Die
2023as Stephanie Lauter
Hey, Melissa!
2022as Melissa
Nightmare Time: Honey Queen
2021as Zoey Chambers
Nightmare Time: Yellow Jacket
2021as Webby / Steph Lauter / Woman
Nightmare Time: The Hatchetfield Ape-Man & Watcher World
2020as Alice Woodward
Nightmare Time: Jane's A Car & The Witch in the Web
2020as Harmony Jones / Doug / Webby / Aerobics Coach / Casey
StarKid Homecoming
2019
The Guy Who Didn't Like Musicals
2018as Alice / Zoey
The Guy Who Didn't Like Musicals
2018 Nightmare Time: Perky's Buds & Abstinence Camp
as Steph Lauter
The Guy Who Didn't Like Musicals: Reprised!
as Melissa /Zoey Chambers /Alice Woodward /The Greenpeace Girl /Doug (as Mariah Rose Faith Casillas)
Television (8)
Fesspool
2026as Self
Parlor Room
2025as Self
Smosh Presents: We're All Gonna Die
2025as Evangeline Walker
REALM
2025as Shira Masterling
Dirty Laundry
2022as Self - Guest
Artists On Artists On Artists On Artists
2021as Genevieve Peters
Nightmare Time
2020as Alice Woodward
Nightmare Time
2020as Zoey Chambers / Steph Lauter / Webby / Alice Woodward / Woman
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