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Sierra Hull & Billy Strings Do Traditional Bluegrass Justice with a Duet on Austin City Limits

Apr 9, 2025

Last week, Austin City Limits released an excellent bluegrass performance from their Austin City Limits Celebrates 50 Years broadcast, which debuted on April 4 on PBS. Mandolinist Sierra Hull and guitar phenom Billy Strings appeared on the special ACL show, performing a classic bluegrass number, “Midnight on the Stormy Deep,” a traditional song that entered the bluegrass canon via Bill Monroe himself. (Watch above.) It’s a popular duet, whether at jam sessions or on stage, and in this iteration finds the forward-thinking pair of Hull and Strings employing more retro sounds. Both are adept at these tones and textures, but tend to opt for more envelope-pushing picking on their own songs and creations. It’s lovely to hear both players in a bit more reserved a setting, with moments of star power shining through their tasteful playing and careful listening.

It’s striking how crisp, clean, and precise Hull and Strings render the song, but the grit and gristle that we tend to associate with bluegrass – and that “high lonesome sound” – are evident, certainly not in short supply. Hull’s solos are playful with zany touches and bluesy licks. Strings holds down the resonant lead vocal part while Hull adds the high harmony, both singing the lyric entirely in duet, because that’s how it goes! Strings pulls hard through his own solo with his signature confidence and boldness, while reminding his listeners how pivotal an influence Doc Watson has been across his career.

Hull and Strings are no strangers to collaborating, and in many contexts. Remember that time they covered Post Malone together? And well before Postie’s country foray and Strings’ track features on it. Hull has been known to guest on Strings’ shows, and vice versa. Their backstage cover of “What Does the Deep Sea Say” taped at the Ryman Auditorium has hundreds of thousands of views; “Midnight on the Stormy Deep,” meanwhile, has amassed nearly 200,000 views since it landed on YouTube late last week. Plus, Strings fans will recognize the track, not only from the bluegrass songbook, as it were, but from Strings’ own discography as well. He dueted with bluegrass legend and Hall of Famer Del McCoury on a version of the number a few years back. We never tire of it.

Whatever the many factors that led to Hull and Strings picking “Midnight on the Stormy Deep” together on ACL, they all add up to a live performance that’s easy, confident, and fun, and ultimately speaks to the deep and wide roster of young and younger bluegrass professionals who are keeping this music alive and in the limelight. For the coming generations and as-yet uninitiated new bluegrass fans, too.


Read our recent Cover Story interview with Sierra Hull on her brand new album here.

Read our recent exclusive interview with Billy Strings here.

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