Couples' costumes on Halloween are always fan favorites, and even more so when it's a celebrity couple.Heidi Klum and her husband look unrecognizable on the red carpet every year in head-to-toe prosthetics, while Sarah Michelle Gellar and Freddie Prinze Jr. have referenced iconic movies from the '80s in the past.Here are some of the best couples' Halloween costumes from over the years.The official Queen of Halloween always goes above and beyond for her annual Halloween party, and her husband, Tom Kaulitz, plays along each year.At her party in 2025, the couple looked unrecognizable as they posed for photos on the red carpet. Klum dressed as the Greek mythological character, Medusa, while Kaulitz dressed as a warrior she had turned into stone.The costume consisted of a full green prosthetic bodysuit with scales and a tail following behind her, with fake teeth and a crown of snakes on top of her head, which actually moved."I love for people to see this and think whatever they want to think for the first time when I go on the red carpet," she told Fox News Digital in 2024. "I never like to share it before, because then people are gonna be like, ‘Oh, it wasn’t as good as I thought it was gonna be.'"In 2024, Klum and Kaulitz arrived to the annual Halloween party dressed as different versions of E.T. from the hit '80s movie, "E.T. the Extra-Terrestrial."Kaulitz dressed as the more traditional version of E.T., while Klum dressed as the version of the character from when the kids in the movie try to disguise him, donning a black hat, blonde wig and red shawl."As a 9-year-old in Germany, E.T. introduced me to the idea that there’s life outside planet earth," she said on Instagram. "I know E.T. wanted to go home, but I hope that if the movie took place in 2024, that my favorite extra terrestrial would come to my party instead."Selena Gomez and Benny Blanco were late for a very important date as they followed the white rabbit down the rabbit hole and into Wonderland for Halloween in 2024.The couple dressed as Alice in Wonderland and the Mad Hatter, with Gomez wearing a whimsical blue dress with white socks and a blonde wig. Blanco wore black pants with a brown jacket and multicolored undershirt, paired with a big top hat and an orange wig, as he got into character with white face makeup."Curiouser and curiouser.." Gomez captioned the Instagram post.Paris Hilton channeled her inner Britney Spears when she dressed as the singer in her music video for "Toxic."The 45-year-old media personality posed for photos at the Casamigos Halloween Party in 2023 in a futuristic blue flight attendant uniform, which she paired with metallic silver-heeled boots and sunglasses.Reum was all smiles as he stood next to her donning an airline pilot uniform."I’m the ghost with the most, babe," Kourtney Kardashian captioned a 2023 Instagram post featuring her and Travis Barker in their ghoulish Halloween costumes.The celebrity couple dressed up as Beetlejuice and Lydia Deetz at their wedding. Barker wore white makeup on his face with dark circles around his eyes, paired with green hair and a burgundy red suit, perfectly capturing the essence of the spirit.Kardashian embodied his blushing bride in a red dress with a lace neckline and sleeves, and wore her hair in an intricate updo as she posed for the photo with a serious expression and holding a bouquet of roses.Cindy Crawford and Rande Gerber embraced their inner rock stars when they dressed as David Bowie and Debbie Harry at their Halloween party in 2018.Gerber's costume consisted of black pants and a black shirt, which he paired with a Union Jack flag coat, a red and white scarf tied around his neck and a spiky orange mullet wig. He also painted a red lightning bolt over one of his eyes to emulate Bowie's alter ego, Ziggy Stardust.Crawford, on the other hand, wore a yellow T-shirt dress over ripped-up black tights and knee-high heeled boots with a black belt around her waist and a red handbag. She styled her hair in a big blonde wig and wore heavy eye makeup.One of reality TV's most iconic characters dressed up as one of TV's most legendary icons, when Lisa Rinna and her husband Harry Hamlin cosplayed Lucy and Ricky Ricardo from "I Love Lucy."Rinna channeled the comedy legend with a red wig, over-the-top makeup, a blue dress with white polka dots and a white apron. She posed for photos by pursing her lips and putting her finger up to her mouth, mimicking Lucy's classic expression.Hamlin stood next to her wearing a suit, and raised one eyebrow as he gave the camera a serious look.After decades together, Freddie Prinze Jr. and Sarah Michelle Gellar have had some pretty iconic couples costumes.In 2019, the couple dressed up as Doc Brown and Marty McFly from the hit 80s movie, "Back to the Future." They shared the costume on Instagram, captioning the post, "Great Scott!!!"GET ENTERTAINMENT SCOOP DELIVERED RIGHT TO YOUR EMAIL BY CLICKING HEREThe "She's All That" star wore a white jumpsuit, yellow hazmat gloves, a messy white wig with lab goggles as he posed next to Gellar, who wore jeans, a button-up shirt with denim sleeves and a red puffer vest. She accessorized with a skateboard to perfect the Marty McFly look.The couple also recreated an iconic scene from the 1987 movie, "Dirty Dancing," choosing to dress up as characters Frances "Baby" Houseman and Johnny Castle.In the photo, Gellar is wearing a cropped white button-up and capri denim shorts, as well as a curly short wig, as she crawled on her hands and knees towards Prinze, who was dressed as dance teacher Johnny Castle in black pants and a black tank top."Nobody puts baby in the corner #happyhalloween from Baby Houseman and Johnny Castle #dirtydancing #loverboy," she captioned the post.LIKE WHAT YOU'RE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWSFormer couple Kelsea Ballerini and Chase Stokes were hopelessly devoted to one another when they posed for photos together at Heidi Klum's Halloween party dressed as Danny Zuko and Sandy Olsson from the movie "Grease."The country singer's take on the iconic character included tight leather pants, an off-the-shoulder black shirt and a leather jacket, which she paired with red high heels. She styled her hair in curls and a deep side part, and got into character with red lipstick.Stokes played the part of a greaser effortlessly in an all-black outfit, including a leather jacket with "T-Birds" written across the back. He styled his hair with a curl in the front, and accessorized with a cigarette in his mouth.PUT YOUR ENTERTAINMENT KNOWLEDGE TO THE TEST AND SEE HOW YOU SCOREMolly Sims was ready to grant partygoers three wishes when she arrived to the Casamigos Halloween Party in 2019 dressed as Jeannie from "I Dream of Jeannie."She channeled the iconic character in flowing sheer pink parachute pants and a pink cropped shirt with red velvet sleeves, a blonde wig tied in a high bun and a headpiece.Her husband, Scott Stuber, also got in on the action, dressing up as Jeannie's love interest, astronaut, Tony Nelson.