Why go to a party in your own fancy dress, when you can go with a gang! Check out these epic group fancy dress themes.
There are loads of characters in Harry Potter - seven books' worth! This family managed eight characters, which is pretty impressive.
This is an odd animal family!
They might need a few more Stormtroopers
Every time a new Marvel film means there's more Avengers to choose from
This looks like the hardest Where's Wally puzzle
Four or more people can make an awesome Mystery, Inc. Although someone could have still dressed up as the van.
There's no limit to how many there can be