Couples costumes are a great way that two people can go to a costume or Halloween party as a set. So many costume ideas are natural pairings. There are great choices for husbands and wives, boyfriends and girlfriends, and even same sex couples or friends. There are so many characters that come in pairs: Popeye and Olive Oyl, Batman and Robin, Homer and Marge Simpson, Shrek and Fiona, Woody and Jessie or Woody and Buzz, The Lone Ranger and Tonto, Fred and Wilma or Fred and Barney, any of the Disney Princesses and her Prince, and so many more.
In addition to famous characters there are plenty of costume concepts that work well as a couples set. Dress as a king and queen or knight and lady. Be a caveman and cave woman, a cowboy and native american, or a ghostly lady and man. Most period costumes include male and female versions, from ancient gods and goddesses, to gangsters and flappers, to 60s hippies or 70s disco dancers.