Competitors, rivals, teammates, and most importantly, best friends. As we get closer to the start of the 2012 Olympic games, we see the intense relationships between fellow athletes begin to grow. It's a true test of friendship as lifelong and new-found friends must withstand the competitive nature of the Olympics in order to "go for the gold." Check out these siblings, childhood friends, and fraternal twins that will be competing together in the Summer Olympics.

[Photo: Ryan Lochte, Michael Phelps via]