Tobey and Leo Vacay in Hawaii

Matthew McConaughey and Lance Armstrong aren't the only hunky guy pals gallivanting around. Good friends and Hollywood Hills neighbors Tobey Maguire and Leo DiCaprio are taking a holiday in Hawaii this week.

Tobey's pregnant fianceé, Jennifer Meyer, Lukas Haas, and an unidentified blonde (is that Leo's rumored new squeeze, Bar Refaeli?) were there as well.

Leo and Tobey spent some time swimming in the ocean, while it appeared Lukas never really got comfortable -- check out the hat, pants and sneakers as proof.