• "Girl Meets World" season 2 airs Fridays at 8:30 p.m. on Disney Channel.

"Girl Meets World" season 2 airs Fridays at 8:30 p.m. on Disney Channel. (Photo : Twitter/Girl_MeetsWorld)

"Girl Meets World" season 2 episode 18 titled "Girl Meets World: Of Terror 2," which will feature the "Austin & Ally" title characters, will be aired live online on Oct. 3, Saturday, via the Disney Channel website and YouTube.

In "Girl Meets World" season 2 episode 18 "Girl Meets World: Of Terror 2," Riley Matthews (Rowan Blanchard) and Maya Hart (Sabrina Carpenter) come across a somewhat old friend when they meet the ghost of the bay window. The ghost happens to be a flapper from the 1920s.

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Written by "Girl Meets World" creators April Kelly and Michael Jacobs, the "Girl Meets World: Of Terror 2" will feature the crew celebrating Halloween with the ghost of the bay window along with Ally Dawson (Laura Marano) and Austin Moon (Ross Lynch) from "Austin & Ally," Reporter Times has learned.

The guest appearance of the "Austin & Ally" stars in "Girl Meets World" season 2 episode 18 "Girl Meets World: Of Terror 2" is said to be intended to boost the ratings of the show, according to Dekh News.

The "Girl Meets World" season 2 cast also includes Ben Savage, Peyton Meyer, August Maturo, Corey Fogelmanis and Danielle Fishel. Aside from Lynch and Marano, Cooper J. Friedman, Jade Holden, Ava Kolker, Danny McNulty and Brittany Ross will also appear in "Girl Meets World" season 2 episode 18 "Girl Meets World: Of Terror 2."

Aside from playing Riley Matthews in "Girl Meets World" season 2, Blanchard is also set to star in "A World Away" opposite "The League" star Nadine Velasquez and "Brooklyn Nine-Nine" actress Mary Lynn Rajskub.

Watch "Girl Meets World" season 2 episode 18 "Girl Meets World: Of Terror 2" online via Disney Channel or on YouTube here: