All the best ever celebrity halloween costumes - from Heidi Klum's epic Princess Fiona to Chrissy Teigen as the Queen

Would you believe us if we told you this was Heidi Klum?! The Halloween-loving supermodel has wowed us once again with her costume for All Hallows Eve 2018, heading out in full prosthetics with boyfriend Tom Kaulitz as Shrek and Princess Fiona (head to her Instagram for a full rundown of the getting-ready process!).

That's right, our favourite stars have ditched their red carpet finery for the most elaborate costumes this Halloween once again - with the likes of the Kardashians, Chrissy Teigen and John Legend joining Heidi and Tom in our best-dressed category. Scroll down to see the best looks from 2018, as well as all our favourite celebrity costumes from throughout the years...

Kourtney Kardashian couldn't have looked more adorable in her Ariana Grande costume - wearing a sweet pink mini-dress, signature high ponytail and thigh-high boots. She even got the seal of approval from Ariana herself, who posted a series of heart emojis on the Instagram snap.

She also couldn't resist joining her sisters for an epic Victoria's Secret angels group-outing, for which the reality stars borrowed show-stopping outfits from the lingerie brand. Kim Kardashian wrote on Instagram: "Thank you @VictoriasSecret for sending us actual runway looks and real wings to borrow for the night!!! OMG a dream come true! Got to be a Victoria Secret Angel for the night! And Kendall got good practice lol."

We think you'll agree that Chrissy Teigen and John Legend totally nailed it with their impersonations of the Queen and Prince Philip! We're particularly impressed with Chrissy's royal-blue coat and almost-exact handbag - we wonder where she sourced them from...

Amanda Holden wowed her followers with her A Handmaid's Tale costume, revealing that she had done her impressive eye makeup herself. "Under his eye #handmaids #halloween #mu by #me! Amazing what you can do with a nipple cover!" she wrote on her Instagram post.

Rochelle Humes is certainly just as dedicated to Halloween as Holly Willoughby - standing in for the presenter in a glamorous feathered costume alongside Phillip Schofield.

We love Debra Messing's Iris Apfel costume! The actress impersonated the 97-year-old fashion icon in her iconic round glasses, a layered outfit and and plenty of statement jewellery.

Harry Styles went full glam-rock in tribute to Elton John at the star-studded Casamigos Halloween party - and The Rocket Man himself certainly seemed impressed, since he re-posted his costume on his own Instagram page.

Justin Timberlake, Jessica Biel and their son Silas looked mighty adorable in their lego outfits, we reckon. The singer posted an adorable Instagram video walking the streets with his three-year-old, captioning it: "Out here fighting crime in these streets."

Continuing the Disney theme, Channing Tatum dressed as Winnie the Pooh for his daughter's Halloween carnival in 2015. The Magic Mike star joked that he "terrified all the children," as a result, writing on his Instagram page: "Pretty sure I terrified all the children at our daughter's Halloween carnival today. Btw- I'm pooh bear in case anyone can't tell."

Ciara and Russell Wilson dressed as Catwoman and Batman for her surprise 30th birthday celebrations in 2015, and impressed with their uncanny costumes. The singer had believed that she was getting dressed up to go to a movie premiere, but was instead met by guests included Russell and her son, Future Zahir, who was dressed as Superman.

Rihanna dresses as a Teenage Mutant Ninja Turtle in for Halloween in 2014. The singer looked unrecognisable complete with green body paint, a blue wig, and knee high gladiator sandals. A red eyemask and sword completed her look. 

Nicole Richie as Danny DeVito in Twins was one of the best celebrity Halloween costumes of 2013. The Simple Life star posed with a Arnold Schwarzenegger lookalike, with the pair rocking matching suits and sunglasses. On her Instagram account, the mother-of-two shared a photo of the pair in costume, which she captioned: "Happy Halloween from your favorite #TWINS Arnold Schwarzenegger & Danny Devito."

Perrie Edwards had fun transforming into a cheetah for Halloween in 2015, causing speculation that it was infact a dig at her ex Zayn Malik.

The singer took to her Instagram account to share photos of her costume; one a close-up of her face and upper body, which she captioned "Meeeeeow!" The second was a full body shot, in which she wore tight leather trousers and a strapless top. "Cheetahhhh! @heidiunlik3ly You're insane! Thanks for painting ma bodeh!" she wrote alongside.

Cindy Crawford and husband Rande Gerber went as Guns N Roses to a Halloween party in 2013. The supermodel, who went as Slash, rocked a black curly wig and a top hat, along with a sleeve of tattoos and a guitar. Rande, meanwhile, sported Axl Rose's trademark red bandana and long, blonde wig.

Heidi Klum ensured it was a costume to remember when she turned up as a human body to her 2011 Halloween party. The model looked unrecognisable with prosthetic make-up, including a skull cap and rotten teeth. A pair of black heels added a touch of glamour to her look. 

Demi Lovato dressed up as a zombie for her Halloween party in 2013. The star looked spectacular with a bloodied white dress, spooky eye make-up and red contact lens. A black wig completed her outfit. 

Guy Ritchie and son Rocco dressed up as Breaking Bad characters at the Unicef Halloween Ball in 2014. The father-son duo wore matching bright yellow lab suits to replicate characters Walter White and Jesse Pinkman. 

Beyoncé and Blue Ivy dressed up as Janet and Michael Jackson for Halloween in 2014. While the Lemonade singer rocked an all-black outfit and baseball cap, Blue looked utterly adorable in Michael's iconic military jacket, sunglasses and fedora, while holding onto an all-important pink microphone. 

Neil Patrick Harris and husband David Burtka are known for their love of Halloween dressing, and memorably went and Frankenstein and Dracula back in 2013. Twins Gideon - dressed as Wolfman, and Harper - Bride of Frankenstein, also looked the part as they posed for a family photo.

Iggy Azalea mirrored 101 Dalmation's villain Cruella De Vil when she attended the VEVO Halloween party in London back in 2013 - even bringing along an adorable dalmation as a much-needed prop. 

Gossip Girl's Michelle Trachtenberg looked unrecognisable when she stepped out to attend Heidi Klum's annual Halloween party as Tim Burton's Blue Girl. The actress rocked blue body paint for the evening, along with the character's iconic orange hair, striped tights and black-and-white dress. 

Paris Hilton dressed up as pop icon Madonna for Halloween in 2013. The heiress dressed in the singer's iconic Like A Virgin corset wedding dress, fingerless gloves, and an oversized white bow in her long, blonde hair. A single silver cross earring completed her outfit. 

Gisele and Tom Brady went as Dorothy and the Cowardly Lion from The Wizard of Oz for a Halloween party in 2013. Gisele, who even had a toy Toto dog as a prop, shared a sweet photo of the pair kissing, uploading it to her Instagram account. "Having fun with my Lion last night!" she captioned the photo.