Margo Price made her headlining debut at Nashville famed Ryman Auditorium on Saturday night, and the singer-songwriter welcomed a couple of very special guests for the occasion, including former bandmate and modern country outlaw Sturgill Simpson.

As The Boot notes, Simpson first sat in with opening act Tyler Childers for a couple songs, “Honky Tonk Flame” and “Whitehouse Road,” both off Childers’ 2017 debut Purgatory, which Simpson co-produced. Later on in the night, Simpson reemerged to help out Price on “After the Fire is Gone,” a duet originally sung by country icons Conway Twitty and Loretta Lynn. Simpson formerly had a stint in Price’s backing band The Price Tags.

Lukas Nelson also made an appearance during Price’s set, joining her for “Learning to Lose.” Nelson’s father Willie features on the studio version of the track, which appeared on Price’s album All American Made.

Watch fan-shot videos of some of the night’s collaborations below.