Andy Lewis appears during Madonna's halftime performance at Super Bowl XLVI Feb. 5, 2012, in Indianapolis. (AP Photo/Charlie Riedel, file)

A weekend BASE jumping accident in a Utah canyon killed two people, one of them a daredevil athlete best known for performing onstage with Madonna at the 2012 Super Bowl, authorities said.

The sheriff’s office in Grand County, Utah, confirmed one of the dead was Andy Lewis, an extreme athlete known for feats in BASE jumping, a dangerous sport that involves parachuting to the ground after jumping from a tall fixed object such as a building, a bridge or a desert cliff overlooking a deep canyon.

In BASE jumping circles, Lewis had a huge following and a reputation for pushing the envelope — leaping into tighter spaces or deploying his parachute later than his peers would dare, said John McEvoy, a BASE jumping instructor in Twin Falls, Idaho, who has jumped with Lewis.

“He had an incredible level of athleticism and skill that was developed over years of practice,” McEvoy said. “But then he would take an incredible amount of risk.”

Lewis was also a prominent figure in the niche sports of slacklining and tricklining, which combine elements of high-wire walking with aerial acrobatics — sometimes at perilous heights.

Lewis went from obscure athlete to overnight celebrity when he appeared onstage in Madonna’s 2012 Super Bowl halftime show. Dressed in a Roman toga, Lewis bounced and executed tricks on his inch-wide line like it was a trampoline while Madonna sang behind him.

“My phone actually rang itself to death three days in a row,” Lewis said soon afterward in an appearance on Conan O’Brien’s late night show.

Emergency responders were dispatched Sunday to a report of people injured in a BASE jumping attempt at Mineral Bottom, a remote desert area near the Utah-Colorado line, according to the sheriff’s office. Lewis and an unidentified 50-year-old man died at the scene, the sheriff’s office said in a news release.

Though there’s no official tally of BASE jumping deaths, a list compiled by the website BASEaddict.com shows 540 total fatalities worldwide since 1981 — including 30 people killed last year. Prominent deaths include BASE jumper Dean Potter and his climbing partner, Graham Hunt, who were killed in 2015 while attempting a wingsuit flight in California’s Yosemite National Park.

A study focused on BASE jumping in Norway, published in a medical journal in 2007, estimated that BASE jumping carried risks of injury or death five to eight times greater than skydiving.