The film begins in Transylvania, where Count Dracula laments about his loneliness with his three bat servants. He receives a phone call from Emma Wishbone, who has mistakenly called him instead of a monster costume store. She talks to him briefly before accidentally dropping her cell phone down a storm drain. Emma is depressed as family tensions build up - her own bookstore is in dire financial straits, her son Max is a victim of bullying due to his awkward and stereotypical mannerisms, her daughter Fay is a narcissistic teenager, and her husband Frank is overworked and sleep-deprived, neglecting her. Dracula decides to make Emma his new bride, and persuades Baba Yaga to curse her and turn her into a real vampire so she will stay with him. Her new-age friend Cheyenne give her some tickets to a costume party, and Emma makes costumes for her family: She as a vampire, Frank as Frankenstein's monster, Fay as a mummy, and Max as a werewolf. Due to a mixup at the party, they are thrown out by security, causing Emma to have a breakdown. Baba Yaga takes advantage of the situation and curses her, but as her entire family were unhappy they are all cursed and transform into the monsters they dressed up as. Emma chases Baba Yaga who escapes, but not before they learn that her amulet needs to be recharged at the London Eye which happens to have been built on a site of ancient power. Meanwhile Max scares his bully, enjoying his transformation and Fay is rejected by her school crush. Frank has lost his intelligence, but still shows love for Emma.
Emily Watson as Emma Wishbone, Frank's wife and the mother of Fay and Max. She is turned into a vampire.
Nick Frost as Frank Wishbone, Emma's husband and the father of Fay and Max. He is turned into a monster similar to Frankenstein's monster.
Jessica Brown Findlay as Fay Wishbone, the daughter of Emma and Frank who is turned into a mummy.
Ethan Rouse as Max Wishbone, the son of Emma and Frank who is turned into a werewolf.
Celia Imrie as Cheyenne, Emma's co-worker at her bookstore and family friend.
Catherine Tate as Baba Yaga, Dracula's former captive witch. She is responsible for turning the Wishbone family into monsters.
Jason Isaacs as Count Dracula, a vampire who becomes infatuated with Emma.
Ewan Bailey as Renfield, Baba Yaga's husband and Dracula's former butler.
Issac Rouse as Jayden, Fay's boyfriend.
Daniel Ben-Zenou as Imhotep, a mummy who teaches Fay how to use her mummy abilities.
Monster Family (also known as Happy Family) is a 2017 European-German computer animated horror comedy film directed and produced by Holger Tappe, and co-written by David Safier. It is based on David Safier's children's book Happy Family. The film stars Emily Watson, Nick Frost, Jessica Brown Findlay, Celia Imrie, Catherine Tate, and Jason Isaacs. The film was both a critical and financial failure: it was unanimously panned by critics, who criticized its voice acting, animation, writing and humor. It was also a box office bomb, only grossing $26.4 million against a $30 million budget.