Halloween // Best way to do a couples costume as Johnny Depp and Amber Heard?

My gf and I are going to a rave for Halloween and were thinking of going as them but can’t decide how best to dress up. Maybe turn a bed sheet into a dress and cover it in brown marks? But would people recognize it? What about for Johnny depp? I love him in fear and loathing and think that costume would be great for a rave as well. Would people be able to recognize the two costumes and put it together what we are?