From left, Jim Peterson, Chris Rovetti and Tim Sarter in the 6th Street Playhouse production of "Hank Williams: Lost Highway."

The core group of Sonoma County musicians featured in local hit theatrical productions of “Hank Williams: Lost Highway” at Santa Rosa’s 6th Street Playhouse, and “Always, Patsy Cline” at 6th Street and Petaluma’s Cinnabar Theater, is going back onstage again.

Jim Peterson, Chris Rovetti , Tim Sarter and Dave Zirbel will perform in the Heritage Music Theatre production of “Woody Guthrie’s American Song,” a musical tribute show opening Dec. 31 at the Cinnabar.

“The four of us are certainly a band at this point,” said Peterson, guitarist and bandleader. “We’ve played together quite a bit. After all the ‘Hank Williams shows, we kind of understand how to work with one another. The ‘Hank Williams experience has made us feel like we’re a tight little company.”

The show will continue through Jan. 23.  Admission: $25-$35. Information: (707) 763-8920,