The Simpsons kill off beloved character that has been on the show for over 30 years

Warning: Spoilers ahead

A well-loved (and hated) The Simpsons character has been killed off after 33 years on the show.

The Simpsons is famed for it memorable Halloween specials and its most recent one has seen one of the animation's long-standing characters killed off.

Titled 'Treehouse of Horror XXXIV', the synopsis for the episode that aired on Sunday (5 November) reads: "In the thirty-fourth annual Simpsons Halloween special, Bart is turned into an NFT, Lisa turns to Sideshow Bob for help in tracking down a serial killer and an outbreak turns Springfielders into Homers."

But not is all as it seems with Lisa and Sideshow Bob's partnership as things take a drastic turn in light of Lisa's split personality coming to light.

Since The Simpsons began in 1990, Sideshow Bob has been plotting Bart's death and has attempted to murder the troublesome kid on several occasions.

You'd expect that it would be Bart that would eventually kill Sideshow Bob (voiced by Frasier star Kelsey Grammer), but it's actually Lisa who murders the convicted criminal.

In the wake of Lisa's murderous streak,The Simpsons fans took to X to share their thoughts.

Disney/20th Century

"I knew Lisa was going to kill Sideshow Bob," penned one person.

"Omg, evil Lisa is so good - she is more scary than Sideshow Bob," said another.

Others were left surprised that goody-two-shoes Lisa was the one to kill him.

"No way lisa kill sideshow bob #TheSimpsons," tweeted one viewer.

Another went on: "Lisa! You didn't! #TheSimpsons."

"So Lisa was the killer? I'm shocked #TheSimpsons," added someone else.

Elsewhere in the Halloween special, Kylie Jenner made her The Simpsons debut and starred as herself.

Discussing how he approached Jenner for the role, showrunner Matt Selman told Variety: "We wrote her some pages, and I think it’s a good fit. She was up for it and game to be made fun of as a celebrity shill.”

Disney/20th Century

"It was a bit of a door opener," he added.

"I think as someone playing themselves, the part has comedic integrity.”

The latest Halloween special comes as part of The Simpsons' recent 35th series which fans have been voicing their love for online and say that the show is now 'good again'.

"Absolutely incredible Simpsons episode dropped last night," one person wrote on 9 October.

"I genuinely think The Simpsons is actually pretty good again," added another.

"Clever and satirical in a way that made the show funny but also heartfelt."