Duo is an acoustic album by Richard Marx and Vertical Horizon vocalist Matt Scannell.

[1] The disc was released on May 12, 2008, exclusively through RichardMarx.com,[2] and was later made available for sale at their concerts together as well.

Marx and Scannell exhibit both of their acclaimed works.

Marx remade a version of "Always On Your Mind," for his 2008 album Sundown.

[1] The disc is predominantly done on acoustic guitar aside from the track "Give You Back" performed on piano.