It's the spookiest time of the year and, as always, the stars have pulled out all the stops for Halloween, dressing up as music legends, beloved movie characters and pop icons.
Take a look at some of our favourite celebrity Halloween looks below.
Adele as Morticia Addams
Adele donned a floor-length black gown, a sleek brunette wig and gothic makeup for the Morticia Addams costume she wore during a performance for her Las Vegas residency over the weekend.
Megan Fox and Machine Gun Kelly as Kill Bill's Beatrix Kiddo and Gogo Yubar
Megan Fox and her partner Machine Gun Kelly donned matching Kill Bill costumes for a Halloween party, despite the acting union SAG-AFTRA issuing guidelines not to wear costumes promoting content made by studios they are in dispute with.
They also channeled characters from the popular anime and manga Death Note at another Halloween party.
Lizzo as Tina Turner
Lizzo, who was a brilliant Marge Simpson last year, paid homage to music icon Tina Turner with a sparkly frock and voluminous wig.
Justin and Hailey Bieber as The Flintstones
The couple channeled The Flintstones in their outfits for a Halloween party in Los Angeles.
Kim Kardashian and North West
Kim Kardashian and her daughter North West transformed into the iconic leading characters Cher Horowitz and Dionne Davenport from the 1995 hit film Clueless.
Paris Hilton as Britney Spears
Paris Hilton dressed up as her friend Britney Spears for Halloween, paying tribute to the popstar's flight attendant look from her Toxic music video.
Kourtney Kardashian as Kim Kardashian
Pregnant Kourtney Kardashian recreated her sister Kim's widely memed 2013 Met Gala look.
Rande Gerber and Cindy Crawford go full Grease lightning
Supermodel Cindy Crawford and her husband Rande Gerber dressed up as Grease power couple Sandy Olsson and Danny Zuko.
Kendall Jenner as Marilyn Monroe
Kendall Jennder donned a short, curly blonde wig to transform herself into Marilyn Monroe, captioning the images on Instagram: "happy birthday mister president."
Kelly Sawyer Patricof and Jessica Alba as Britney
Kelly Sawyer Patricof recreated Britney's Hit Me Baby One More Time schoolgirl look, while Jessica Alba bedazzled in another Toxic-inspired outfit.
Megan Thee Stallion as a flower
American rapper Megan Thee Stallion threw a Tim Burton-themed party and was utterly transformed as a rose.
Kaia Gerber and Austin Butler as artist and muse
Model Kaia Gerber and her actor boyfriend Austin Butler dressed up as Edie Sedgwick and Andy Warhol.
Kate Beckinsale as Barbarella/Pennywise
Actress Kate Beckinsale went for a movie mash-up for her costume, dressing up as a cross between Barbarella and terrifying clown Pennywise from It.
Ice Spice as Betty Boop
Rapper Ice Spice transformed into cartoon character Betty Boop for a performance in New Jersey.
Jodie Turner Smith
Actress Jodie Turner Smith went for a feline schoolgirl look for a Halloween bash.
Margot Robbie in a V for Vendetta mask
Barbie star Margot Robbie went incognito at a Halloween bash, dressing up as vigilante V from the cult film V For Vendetta.
Saweetie as Edward Scissorhands
Rapper Saweetie was a convincing Edward Scissorhands.
