Halloween // Couples Costume that starts with C

Hello,

My friend's 40th birthday is coming up next month and he is obsessed with Halloween, so he decided he wants everyone to come in a costume that begins with the letter "C" since his first name is Carson. Both my boyfriend and I were invited, and originally I was thinking of going as Cruella de Vil, but he wants to do a couples costume. Does anyone have any good couples costumes that both start with a C?