THE BIG BANG THEORY Meets YOUNG SHELDON in Upcoming Crossover

"The Big Bang Theory" will meet "Young Sheldon" in an upcoming crossover episode, according to The Hollywood Reporter.

A December episode of the comedy, which is in its final season, will feature a brief crossover with its spinoff. Three characters from "Young Sheldon," Iain Armitage, Lance Barber and Montana Jordan, will make cameos as their characters.

CBS and producer Warner Bros. TV are keeping details of the actual episode plot under wraps, however.

Armitage plays the young version of Sheldon Cooper (Jim Parsons), who starts attending high school at age 9 in his East Texas hometown. Barber plays Sheldon's dad, George, and Jordan is Sheldon's older brother, Georgie (Jerry O'Connell has played grown-up George Jr. in a few Big Bang episodes).

Parsons narrates Young Sheldon as the adult Sheldon and is an executive producer of the spinoff.

Read the original article on The Hollywood Reporter.