"And This Is My Beloved" is a popular song.
Background
This song was in the 1953 musical Kismet and is credited to Robert Wright and George Forrest. Like all the music in that show, the melody was in fact based on music composed by Alexander Borodin, in this case, Borodin's String Quartet in D.
The same melody had earlier (1946) been used for a song credited to William Engvick, Bert Reisfeld and Alec Wilder entitled "Spring Magic," which was recorded by Charlie Spivak and his Orchestra.
A version by Mario Lanza became popular in 1956. Sergio Franchi sang this song in 1962 when he was discovered by Norman Luboff singing on Sunday Night at the London Palladium. A favorite guest of Ed Sullivan, Franchi sang it on the February 4, 1968, broadcast by CBS; and recorded on his 1964 RCA Victor album The Exciting Voice of Sergio Franchi