Bono was the special guest Friday night at the Omaha wedding of Susie Buffett's daughter.
The frontman for U2 serenaded the couple — Emily and Tom — by performing “Stand By Me,'' a song popularized by Ben E. King in the 1960s.
Bono's appearance leaked on Instagram, where someone published a photo with the caption "Just your normal Omaha wedding."
About 285 guests attended the wedding and reception at Lauritzen Gardens.
The guests included Emily's grandfather, investor Warren Buffett, and her uncles Howard and Peter Buffett.
U.S. District Judge Laurie Smith Camp officiated.
Flowers were provided by Stems and decorations by AAA Rents & Event Services.
The prenuptial dinner was held Thursday night at Pitch Coal-Fire Pizza in Dundee.