The midfielder joined the Academy from West Bromwich Albion early last year and has since impressed in claret and blue.
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Quinn turned pro just a year ago with Villa and has now been rewarded for his progress with a new contract extension.
"We are delighted Keilan has signed a new contract," said Villa academy chief Mark Harrison.
"This is a well-deserved reward for his development over the last couple of years.
"Keilan has an outstanding attitude and plays the game with maturity. He is a central midfielder who links the game well between the other units. He has also recently represented the Republic of Ireland at Under-19 level."