Fleetwood Mac singer Stevie Nicks officiated the wedding of Deer Tick frontman John McCauley and singer Vanessa Carlton’s on Friday, December 27.

Nicks made the union official by signing their marriage paper work and presiding over the ceremony during the outdoor event.  McCauley instagrammed a photograph of Nicks signing the paperwork commenting, “Here is Stevie Nicks doing my marriage paperwork. It’s a misdemeanor in the state of Arizona if she messes it up. She’s a badass reverend. It was an awesome ceremony. Thank you Stevie! And thank you all for the good wishes!”

McCauley told Relix he first met Carlton through My Morning Jacket’s Patrick Hallahan.