Emmylou Harris is gearing up for her latest project, an album and tour with longtime friend and former guitarist, Rodney Crowell.

"We finally did the duet record that we've talked about over the years. We have sung together and done thingsā€¦ but have never done a whole record together." Harris told Billboard at the MusiCares event over the weekend. The album, titled "Old Yellow Moon" is set for Feb. 26 on Nonesuch Records.

Harris describes the project as "a conversation between two old friends."

"We revisited songs that we wanted to do. There are Rodney songs on there but they are older songs that he wrote and other people recorded, like 'Bluebird Wine' -- my first Rodney song that I recorded."

According to Harris, the recording process was extremely relaxed. The duo teamed up with Brian Ahern, who produced the project and was involved in past Harris and Crowell projects. "It was another friend working on the record so it was a lot of hanging out and just getting back into some work projects like we had done years before."

Harris gave Billboard a sneak peak at some of the tracks on the album. "There's a song that people might know that was written by Allen Reynolds and recorded by Waylon Jennings called 'Dreaming My Dreams.' It's a title track of one of the great country records of all time produced by Jack Clement. It's been a favorite of Rodney and mine forever but no one's ever done it as a duet so we kind of gave it a little bit of a different spin."

Following the release of the album, Harris and Crowell are planning to go on tour. "We are putting together a new band and are getting ready to go into rehearsals the week after next. Then we'll hit the road," she explained. The Old Yellow Moon tour will take the duo overseas for the entire month of May, with US dates to follow.

"It's a wonderful song cycle," she exclaimed. "We kept in touch and have been friends and collaborators all these years but we finally got around to doing an entire record."