Robbie Hart is a talented wedding singer in the 1980s, enjoying his job of performing at weddings in his local town in New Jersey, despite his own failed aspirations of becoming a rock star. He is engaged to his long-time girlfriend, Linda, who seems more enamored with the idea of marrying a rock star than with Robbie himself. Meanwhile, Julia Sullivan, a sweet and caring waitress, works at the same function hall where Robbie performs. She is engaged to Glenn Gulia, a wealthy, self-absorbed Wall Street broker who is frequently disrespectful towards her. Despite their engagement, Julia dreams of a wedding that reflects her true desires, not just the extravagant display Glenn insists upon.

As Robbie's personal and professional life begins to unravel following a surprising turn of events with his fiancée, he finds a friend in Julia, who needs help planning her own wedding. Through their time spent together, Robbie and Julia discover they have much in common, including a dissatisfaction with their current relationships and a longing for something more genuine. Their friendship blossoms as they work closely, creating tension due to their respective engagements. Their connection not only challenges their perceptions of love and happiness but also leads them to question what they truly want for their futures.