Prinze shared the secrets behind their lasting marriage ahead of their 15-year wedding anniversary last year.
"We treat each other with respect, we didn't just get married because we thought the other was young and hot. I think that sort of crushes relationships a lot," the actor said.
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"Sacrifice is something that's required in a marriage. It's fun being single, right? You can be selfish. But marriages require a step back from that and a bit of sacrifice, and our sacrifice I think is maybe the biggest thing that's made our marriage work," he added.
Prinze and Gellar are parents to 8-year-old daughter Charlotte Grace and 5-year-old son Rocky James.
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