"It's family time here tonight, we're gonna have the whole family come out," Young told the crowd as he introduced Willie Nelson. "What do you say, pop?" Nelson soon strapped on a guitar and joined Young and his sons on Old Ways' "Are There Any More Real Cowboys?," a track Nelson and Young have played together in the past. Nelson stuck around for one more song, leading his classic "On the Road Again" alongside Young and Promise of the Real.
Nelson's appearance onstage wasn't a complete surprise as, earlier in the day, Lukas Nelson revealed on Instagram that Willie sat in with the band during rehearsals at the Temre Di Caracalla venue. Following Friday's concert, Lukas Nelson wrote, "Dad joined us tonight in Rome. To be able to support my two heroes together on stage with my brothers is a joy that is indescribable."