Tedeschi Trucks Band are in the midst of a three-night run at Boston’s Orpheum Theatre, and after welcoming out Jorma Kaukonen for “Key to the Highway” on Thursday night, the band continued in that vein on night two with a couple sit ins from opening act and one-half of Indigo Girls, Amy Ray.

During TTB’s set, which featured their regular mix of originals and covers like Derek and the Dominos’ “Keep On Growing,” Leon Russel’s “Delta Lady” and Santana’s “Soul Sacrifice,” Ray came onstage with her guitarist Jeff Fielder for a run of “Angel From Montgomery” with an interlude of the Grateful Dead’s “Sugaree.” Ray and Fielder would both later return to the stage for an encore performance of Bob Dylan’s “You Ain’t Goin’ Nowhere,” with altered lyrics referencing Standing Rock from Ray.

In related news, on Thursday opening act Jorma Kaukonen also joined Tedeschi Trucks Band onstage at the same theater. The Hot Tuna guitarist emerged for a take on “Key to the Highway.”

Watch videos of both of Ray’s performances above and below. Tedeschi Trucks Band return to the Orpheum stage tonight to close out the run.