Ruby's Abuela is played by Peggy Blow
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Netflix's On My Block: Meet the season 4 cast

9. Ruby's Abuela is played by Peggy Blow
Peggy Blow plays Ruby’s Abelula. She’s had iconic roles in both seasons of American Crime Story, How To Get Away With Murder, Castle, Dexter, Criminal Minds, Desperate Housewives, That’s So Raven and Seinfeld across a three-decade career.