Hollywood's Hottest Couples -- Guess the Dashing Duo!

It's Monday and this mighty fine lookin' couple hit the beach with their rockin' bods on full display, but can you guess who they are?! Here's a few clues:

If you don't know 'em from a popular reality TV show, you definitely have heard of his famous sister ... When they're not in the gym pumpin' iron, they're doting parents to their 3 kiddos ...