Joan Rivers isn't just an acerbic comic and tchotchke peddler—she's an ordained minister! So when the comedy legend was at a Barnes & Noble in New York to sign copies of her new book, Diary of a Mad Diva, she agreed to officiate the impromptu wedding of a gay couple who are big fans of hers.

Rivers was fielding questions from the audience when Joe Aiello and Jed Ryan asked if she'd marry them right then and there. The 81-year-old icon brought the couple of three years up on stage and performed the ceremony, as fans cheered from the crowd.

"While we were waiting, we were reading the book," Aiello told Entertainment Tonight. "She mentioned being an ordained minister, and I jokingly asked [Ryan], 'Do you think it's true? Maybe she'll marry us.' And he goes, 'Ask her.' So I did. I don't think he really thought I would, and neither one of us thought she'd say yes!"

We're sure Joan had some real zingers to hit the happy couple with, but bit her tongue in the spirit of love.