Despite their longstanding romances, these celebrity couples aren't ready to make things official
Jon Hamm and Jennifer Westfeldt
The Mad Men star met the director in 1997, but he doesn't plan to marry her. "I don't have the marriage chip, and neither of us have the greatest examples of marriages in our families," Hamm has said. "Jen is the love of my life, and we've already been together four times longer than my parents."
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