Rock veteran Elvis Costello [ tickets ] and acclaimed country singer Emmylou Harris [ tickets ] will join forces for a short stint of July tour dates.

The outing is scheduled to visit nine cities, playing a mix of theaters and outdoor venues.

Costello continues to back last year's "The Delivery Man," the singer/songwriter's latest studio album with his band The Imposters. Earlier this month, Eagle Rock Entertainment issued "Club Date Live in Memphis," a DVD that Costello and Imposters shot during a summer 2004 performance at the Hi-Tone Lounge.

The latest release from Harris is 2003's "Stumble into Grace." The set features guest appearances from Linda Ronstadt, Kate and Anna McGarrigle, Jane Siberry, Julie Miller and Luscious Jackson's Jill Cuniff.

As she did on her 2000 album, "Red Dirt Girl," Harris wrote or co-wrote all of the material on "Stumble Into Grace," something she has rarely done over the course of her 35-year recording career; prior to "Red Dirt Girl," Harris's only set comprising material she wrote or co-wrote is 1985's "Ballad of Sally Rose."