Blake Shelton takes Gwen Stefani as his date for stylist's wedding

Blake Shelton turned his stylist's Nashville wedding into a date night over the weekend (09-10Jan16) by inviting Gwen Stefani to join him at the bash.

The singers, who both served as mentors on the most recent season of The Voice, went public with their new romance in October (15), and on Saturday (09Jan16), they stepped out together to attend Amanda Craig's nuptials to Joel Borski at The Loveless Barn.

The country star served as one of the groomsmen during the ceremony, as Gwen joined fellow famous guests Kelly Clarkson and Blake's former The Voice protegee RaeLynn in the congregation.

Blake and Gwen were reportedly inseparable after the rehearsal dinner on Friday (08Jan16), when they were spotted "all over each other" at O'Charley's restaurant and bar in Nashville.

"They were there over an hour," a source tells E! News. "No one bothered them. They sat in the back corner by the bar."

Blake and Gwen have enjoyed numerous outings in Nashville since first stepping out together after the Country Music Association Awards last year (15), and were last spotted in the country music Mecca just before Christmas to attend an engagement party for RaeLynn and her new fiance Josh Davis.

It's the first romance for both stars following the breakdown of their marriages over the summer - Gwen stunned fans in August (15) by announcing her separation from Bush frontman Gavin Rossdale after 13 years as husband and wife, while Blake revealed he and Miranda Lambert had quietly finalized their divorce in July (15) after four years of marriage.