Quand Tu Reviendras (English translation: "When Will You Come Back", sometimes attested ungrammatically as "When You Will Come Back") was the Belgian entry in the Eurovision Song Contest 1968, performed in French by Claude Lombard.
The song was performed third on the night (following the Netherlands' Ronnie Tober with Morgen and preceding Austria's Karel Gott with Tausend Fenster). At the close of voting, it had received 8 points, placing 7th in a field of 17.

The song is a plea from Lombard to her (despite the name, Lombard is female) lover, asking when he will return to her.

It was succeeded as Belgian representative in the 1969 Contest by Louis Neefs performing Jennifer Jennings.