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Kevin Bacon and Kyra Sedgwick: Twenty-year marriages in Hollywood are harder to come by than a botulism-free face, but Kevin Bacon and Kyra Sedgwick remain the height of adorableness after two decades and two kids together. The secret to their scandal-free relationship? "I just... more think I met the right person, my soul mate, and I think he did too. He makes me laugh, and I love him so much," the "Closer" actress said on "Inside the Actor's Studio" in 2007. "He's a beautiful human being and we let each other grow. I think that's also a really big part of it, too."

Passion Rating: Enduring. Kyra and Kevin don't need to spit-shine each other's uvulas to prove their flame still burns brightly. Their body language from a simple peck is positively smoldering.