This might make your jaw drop. Willie Nelson & George Strait had never performed together . . . until Saturday. They finally did it at the “Willie: Life & Songs of an American Outlaw” tribute show in Nashville.

To make up for lost time, they did a brand new song called “Sing One With Willie”. They co-wrote it with a couple of songwriters and it’ll be on George’s upcoming album, “Honky Tonk Time Machine”.

The concert was packed with guest stars . . . including Chris Stapleton, Eric Church, Emmylou Harris, Jimmy Buffett, Jamey Johnson, Margo Price, Alison Krauss, and Vince Gill. It’ll air on A&E sometime later this year.

Also, in honor of the event, The Boot did a great timeline of Willie’s career. They went all the way back to 1957 when he released a song called “No Place for Me”