From Slimer to Casper, Famous Ghosts From Movies and TV Shows

Betelgeuse, from Tim Burton's 1988 "Beetlejuice," is as rude and crude as ghosts come. The freelance bio-exorcist is summoned by calling his name three times, which usually results in some trouble for the summoner.

Newly dead couple Barbara and Adam Maitland hope to enlist Betelgeuse for their own plots for revenge, but quickly discover the mischief that comes from summoning the trickster.

"Sleepy Hollow," another macabre favorite by Tim Burton, features the Headless Horseman, an undead mercenary from the American Civil War that rides on horseback. His one mission is to reunite with his own noggin, but until then, he'll continue to decapitate anyone in his path.

The 18th century rifle is no match for the Horseman.

Molly Jensen and rom-com lovers were heartbroken to find lead character Sam Wheat shot by muggers early on in the 1990 classic, "Ghost."

As the title of the movie suggests, Wheat returns as a ghost and continues to look out for his beloved.

Prior to Sam's death, the couple shares a steamy scene over the potting wheel.

Slimer, also known as the Onionhead Ghost, menaced Peter Venkman, Raymond Stantz, and Egon Spengler in 1984's Ghostbusters...

... and left quite a mess of ectoplasmic slime in his wake.

The 2016 "Ghostbusters," featuring an all-female team, battled new paranormal villains.

Decades later, the team is left with the same slimy results.

Casper, aka Casper the Friendly Ghost, has no recollection of his life and holds no ill will to the new family that has moved into his house.

Casper quickly forges a strange but touching relationship with the family's teen daughter, Kat, and even falls in love with her.

All would be well if not for Casper's three mischievous uncles, who spend the movie playing pranks and scaring those unfortunate enough to be in their path.

In the first season of the suspenseful television series, "American Horror Story: Murder House," a family moves into a haunted house. Tate Langdon, played by Evan Peters, is one of the many ghosts that frequents the home.

Tate Langdon, who is later revealed as a school shooter in his former life, falls in love with the teenage daughter of the new homeowners, Violet.

While Pee-wee Herman attempts to hitchhike to Texas in search of his stolen bicycle in "Pee-wee Herman's Big Adventure," he catches a ride from a truck driver.

Too bad the driver, Large Marge, turns out to be a ghost. 

Harry Potter's Moaning Myrtle is one of the many ghosts haunting Hogwarts, and spends most of her time haunting the second-floor girls' bathroom.

During the Tri-Wizard Tournament in "Harry Potter and the Goblet of Fire," Myrtle flirts with Harry Potter and joins him in the bath. 

Moaning Myrtle eventually reveals to Harry Potter how to crack the puzzle of the golden egg.

Scooby-Doo and the rest of Mystery, Inc., including Fred, Shaggy, Velma and Daphne, are often sent to investigate disturbances caused by supernatural ghouls and phantoms.

Too bad the paranormal ruckus is almost never the work of a ghost, but a human suspect that gets unmasked at the end of each episode: "I would have gotten away with it too, if it weren't for you meddling kids!"