Mr. and Mrs. Used to Be is the first collaborative studio album by American country music singers Ernest Tubb and Loretta Lynn.

[1] Billboard published a review in the issue dated August 14, 1965, which said, "This album pairing two of the greatest names in country music, Ernest Tubb and Loretta Lynn, should be a great sales explosion.

"Mr. and Mrs. Used to Be", a real tearjerker, is combined with the classic "A Dear John Letter" and the country hit "Just Between the Two of Us".

20 on the US Billboard Hot Country Albums chart dated October 9, 1965.

11 on the US Billboard Hot Country Singles chart, the biggest hit the duo would achieve.