Ray Parker Jr., Bill Murray and Ernie Hudson perform 'Ghostbusters' with Jimmy Fallon

Jimmy Fallon knew exactly who to call for his rendition of Ghostbusters... 

The Tonight Show host and his band Roots called upon Ray Parker Jr. and OG Ghostbusters Bill Murray and Ernie Hudson for a hilarious rendition of the classic song - performed with classroom instruments!

Bill Parker sang most of the song, with the others jumping in with “Bustin' makes me feel good!” and shouting “Ghostbusters!” in the chorus.

Watch their performance above!

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Bill Murray and Ernie Hudson were on The Tonight Show to discuss the upcoming release of Ghostbusters: Frozen Empire which is releasing in cinemas this week. 

Forty years after the release of the first film, Bill Murray (Peter Venkman), Dan Ackroyd (Ray Stant) and Ernie Hudson (Winston Zeddemore) are returning to where it all started — New York City, to save the world from a second Ice Age.

“Heads up. Tall, dark and horny at 12 o’clock,” Bill says in the trailer when the group encounters a Devil-like, glowy-eyed beast.

The new trailer also features the Ectomobile zooming across New York, harnessing icy ghosts.