Cheryl Cole and her new husband Jean Bernard Fernandez-Versini
Some like Ben Affleck and Jennifer Garner are still going strong years later.
Meanwhile, those who've been dating a short while, say time is no barometer of their feelings – as Nicola Roberts pointed out in supporting her friend Cheryl's whirlwind wedding.
Zoe Saldana made similar comments about trusting her intuition. She told Marie Claire: "I do what my heart says, what my heart feels. So from the moment I met my husband, we were together. We knew."
It's a little princess!