Whatever kind of creepy counter-culture stunt this couple with the skin masks are performing, it's getting London a little worried.

Tomorrow at Wimbledon, keep an eye out for the two weirdos wandering around, freaking people out. Wimbledon isn't the first time the skin-faced duo has popped up at a high-profile event (they were also spotted at Elton John's White Tie ball, and a store opening with Kim Cattrall. Cattrall actually gave the faceless dude a hummer...) , but the reason behind their facelessness is still unknown. The Daily Mail offers up these possibilities:

Theories include the possibilities that they are limelight-seeking pranksters, performance artists or that they are at the centre of a viral marketing campaign for an as-yet unknown product of forthcoming horror film.

Faceless 'aliens' spotted in crowd at Wimbledon [Daily Mail]