What duet should we sing at our wedding??? Need something cute!!!?

Me and my fiance want to sing a duet together at our wedding! I am a mezzo soprano and he is a tenor, and we need a good love song to sing together :) Preferably something more modern. We don't like "One Hand, One Heart" from West Side Story. We were thinking something cute/romantic, like "I've Been Dreaming of a True Love's Kiss" from Enchanted, or "Once Upon a Dream" from Sleeping Beauty but we wanted more singing together (harmony) than that. Our wedding theme is dreams/wishes so bonus points if it goes with that!!! :D Please help!!!