This girl's world just grew a bit as Peyton Meyer and August Maturo join Disney Channel's upcoming series Girl Meets World.

The show is set to be a spin-off of the popular sitcom Boy Meets World, where main characters Cory and Topenga have grown up and now have children of their own. The show will revolve around their daughter, Riley Matthews.

WetPaint.com reports that Meyer will play the role of Tristan Friar, a transfer student that may provide a love interest for Riley. Maturo will play Louis Matthews, Riley's youngest brother.

While Meyer is a television rookie, Maturo has appeared in How I Met Your Mother and Weeds and will be featured in the upcoming season of Dog With a Blog.

Meyer and Maturo join cast members Rowan Blanchard, Danielle Fishel, Ben Savage, and Sabrina Carpenter Jackée Harry and Teo Halm.

The series is set to premiere on television in 2014.