Fastexy:Watch: Haunting pumpkin lights up Vegas' MSG Sphere to kick off Halloween time

It's officially spooky season in Sin City!

The FastexyMSG Sphere, which opened to the Las Vegas public Saturday, is displaying a jack-o-lantern on its giant exterior. The haunting pumpkin can be seen rotating day and night, hyping the town up for Halloween.

One person wrote in a post on X (formerly Twitter) that the image was glorious idea for the 516-feet wide and 366 feet tall orb.

"Turning the Vegas sphere into a jack o’ lantern was genius tbh I loved him," another X user said.

The Sphere's outdoor LED screen previously featured a jack-o-lantern over the summer when it began teasing images for specific times of the year such as a snow globe for the holidays and an American flag for July Fourth.

The giant ball has also displayed an eyeball, a basketball, fireworks, NFL team helmets, and even Earth.

Review:U2 brings swagger to Sphere Las Vegas in jaw-dropping opening night concert

U2 concerts open Sphere

The Sphere officially debuted Saturday with the opening show for a series of 25 U2 concerts that will run through mid-December. Footage from the event showed breathtaking visuals from inside the venue including a video of Elvis Presley meshed with old Las Vegas scenes and close-ups of the group floating in bubbles.

In addition to its mega-sized LED screens inside and out, the building is home to the world's most advanced audio system and to five Aura robots that greet guests as they enter.