Brothers of other mothers, and sisters of other misters.
Without any ado whatsoever... Check out the similarities between Chelsea and Germany's attacking midfielder Markus Keller and his brother of another mother, Swiss pipe smoker Michael Ballack.
Markus Keller Michael Ballack
And just because you've behaved, here's the SLC jib master Jean Claude Van Damme, and Universal Soldier Jeremy Jones.
As Jimmy Cricket used to say, "And there's more." Send any other dopplegangers you may have spotted to firstname.lastname@example.org and we'll post 'em for the world to snigger at.