Girl Meets World casts Cory and Topanga's youngest child and Riley's crush

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Riley Matthews’ world just became a little more crowded: She now has a little brother and a classmate/first crush.

Peyton Meyer has joined Disney Channel’s Boy Meets World spin-off Girl Meets World as Tristan Friar, a lad who attends school with (and attracts much googly-eyed attention from) title character Riley, TVLine has learned exclusively.

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In addition, August Maturo  will play Louis, the youngest child of Cory and Topanga (Ben Savage and Danielle Fishel, reprising their BMW roles).

Meyer can be seen guest-starring on the upcoming season of Dog With a Blog, while Maturo has appeared on How I Met Your Mother and Weeds.

The series is scheduled to premiere in 2014.