"I Have Dreamed" is a show tune from the 1951 Rodgers and Hammerstein musical, The King and I. In the original Broadway production it was sung by Doretta Morrow and Larry Douglas. It has since become a standard, with many artists recording the song. The tune has been accused of similarities to Alfred Newman's track, "The Hill of the Brilliant Green Jade", from the 1944 film The Keys of the Kingdom starring Gregory Peck, though only 7 notes are the same.
In the show, the characters of Lun Tha and Tuptim sing of how they have dreamt of their true love blossoming, as they prepare to escape from the King's palace. This is in contrast to the subdued mood of the song We Kiss in a Shadow, when they fear that the King would know about their love.