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Hotel Transylvania 4: Secrets of the Monsters (also known as simply Hotel Transylvania 4 and marked as such on home media releases) is a 2030 American computer-animated comedy film produced by Sony Pictures Animation and distributed by Columbia Pictures. The fourth and final installment in the Hotel Transylvania franchise and sequel to Hotel Transylvania 3: Summer Vacation (2018), the film was directed by Genndy Tartakovsky and written by Tartakovsky and Michael McCullers, and stars returning actors Adam Sandler, Andy Samberg, Selena Gomez, Kevin James, Steve Buscemi, Keegan-Michael Key, David Spade, Molly Shannon, Fran Drescher, Kathyrn Hahn, and Mel Brooks, with the new voices of James Woods, Robert Redford, and Tim McGraw. In the film, Dracula and his frienda visit a monster museum where they learn about the secrets of every monster in the world, one of which is very dangerous and could potentially kill the others. The film was released on December 20, 2030, and received mixed reviews from critics. It was also a box-office success, grossing over $679 million on an $80 million budget. To date, it is SPA's highest-grossing film.

Synopsis
Sometime after its predecessor, Dracula and his friends visit a monster museum where they learn about the secrets of every monster in the world, one of which is very dangerous and could potentially kill the others.

Voice cast
See also: List of Hotel Transylvania characters
 * Adam Sandler as Count Dracula, the 541-year old owner of Hotel Transylvania, Ericka's husband, lord of the vampires, Mavis' father, Johnny's father-in-law, and Dennis' grandfather.
 * Andy Samberg as Johnny, a 30-year old human who is Mavis' husband and Dennis' father.
 * Selena Gomez as Mavis, the 127-year old daughter of Dracula, the adopted daughter of Ericka, the wife of Johnny, and the mother of Dennis.
 * Kevin James as Frankenstein, a monster created by Dr. Frankenstein.
 * Steve Buscemi as Wayne, a werewolf who has 70 pups.
 * Keegan-Michael Key as Murray, a wisecracking mummy.
 * David Spade as Griffin, an invisible man.
 * Molly Shannon as Wanda, Wayne's werewolf wife.
 * Fran Drescher as Eunice, the wife of Frankenstein.
 * Kathryn Hahn as Ericka, the great-granddaughter of Abraham Van Helsing, wife of Dracula, adopted mother of Mavis, adopted mother-in-law of Johnny, and adopted grandmother of Dennis.
 * James Woods as Roarg, a vicious dog/cat-like creature who has the power to destroy all other monsters.
 * Robert Redford as Jason, a teenage vampire who is Dracula's long-lost cousin.
 * Tim McGraw as Mason, a monster theorist.
 * Mel Brooks as Vlad, an older vampire, the father of Dracula, the father-in-law of Ericka, the grandfather of Mavis, the grandfather-in-law of Johnny, and the great-grandfather of Dennis.
 * Jim Gaffigan as Van Helsing, a former vampire hunter who is now a mechanized janitor at Hotel Transylvania and Ericka's great-grandfather.
 * Asher Blinkoff as Dennis, Johnny and Mavis' human.vampire hybrid son, inherenting traits from both of his parents. He is currently in love with his best friend, Winnie.
 * Genndy Tartakovsky as:
 * Blobby, a green blob mosnter.
 * Baby Blobby, Blobby's son.
 * Puppy Blobby, Baby Blobby's pet.
 * Sadie Sandler as Winnie, the eldest daughter of Wayne and Wanda. She is currently Dennis' girlfriend.
 * Chrissy Teigen as Crystal, an invisible woman who is Griffin's girlfriend.
 * Joe Whyte as Tinkles, Dennis' giant puppy.
 * Sunny Sandler as Sunny, the youngest daughter of Wayne and Wanda.