In ‘On My Block‘, Sierra Capri plays Monse Finnie, Jason Genao plays Ruby Martinez, and Brett Gray plays Jamal Turner; the series follows four friends navigating high school in inner-city Los Angeles.
Main cast
- Monse FinnieSierra Capri1–4Main
- Ruby MartinezJason Genao1–4Main
- Jamal TurnerBrett Gray1–4Main
- Cesar DiazDiego Tinoco1–4Main
Supporting cast
- Abuelita (Genoveva Martinez)Peggy Blow1–4Supp
- Chivo (Ruth’s grandfather)Julio Macias1–4Supp
- Olivia (Oli)Jessica Marie Garcia1–4Supp
- Ruby’s Mum (Mrs. Martinez)Eme Ikwuakor1–4Supp
- Jasmine FloresPaula Andrea Placido1–4Supp
- Monses’s Dad (Eduardo ‘Eddie’ Finnie)Juan Javier Cardenas1–4Supp
Guest & voice
- Sr. Bernal (Cesar’s father)Emilio Rivera2–4Guest
- DannyDanny Ramirez1Guest
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About this cast
‘On My Block’ is a Netflix comedy-drama series that follows four bright, street-smart friends—Monse, Ruby, Jamal, and Cesar—as they navigate the challenges of high school, friendship, and inner-city life in South Central Los Angeles. The show ran for four seasons from 2018 to 2021, earning critical acclaim for its authentic, heartfelt portrayal of adolescence.
FAQs
Who plays Monse in On My Block?
Sierra Capri plays Monse Finnie in all four seasons.
Who plays Ruby in On My Block?
Jason Genao plays Ruby Martinez, the heartfelt and anxious member of the group.
Who plays Jamal in On My Block?
Brett Gray plays Jamal Turner, the gang’s pop-culture obsessed friend who becomes a detective.
Who plays Cesar in On My Block?
Diego Tinoco plays Cesar Diaz, Monse’s love interest and a member of the Santos gang.
What is the age rating of On My Block?
It is rated TV-MA for language, violence, and sexual content; suitable for mature teens and adults.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026