Zellweger married country musician Kenny Chesney in May.
The wedding news, posted on the Web site of WhiteStripes.com, said a traditional shaman priest performed the canoe-based ceremony "on the confluence of three rivers ... in the Amazon basin in the city of Manaus."
Band drummer-vocalist Meg Wife was maid of honor and White Stripes manager Ian Montone was best man at the wedding before a "small party of close friends."
Elson appeared covered in snakes in the new White Stripes video, "Blue Orchid."
There has been some speculation the wedding might be a publicity stunt, however, publicist Chloe Walsh said Thursday it was the "real deal," reported E!Online Friday.