"Wedding Song (There Is Love)" is a title of a 1971 hit single by Paul Stookey: the song—which Stookey credits to divine inspiration - has since been recorded by many singers (with versions by Petula Clark and Mary MacGregor returning it to the Billboard Hot 100)—and remains a popular choice for performance at weddings.
Instrumental versions have been recorded by the O'Neill Brothers (album A Day to Remember: Instrumental Music for Your Wedding Day (2002)), and Bradley Joseph (album Piano Love Songs (2006)).