James Woolley, a touring member of Nine Inch Nails beginning near the end of the Pretty Hate Machine era, has died of unknown causes. The keyboardist's former wife Kate Van Buren confirmed his death via Facebook.

Woolley memorably appeared with Trent Reznor and company at Lollapalooza in 1991, and continued with Nine Inch Nails through their mud-covered 1994 stop at Woodstock before being replaced by Charlie Clouser.

“James worked hard and played hard with NIN," Van Buren wrote. "He brought coolness to playing keyboards, which isn’t as easy to do as playing guitar or drums. Those years were truly magical and quite an adventure.”

Woolley was part of Nine Inch Nails for The Downward Spiral, the long-awaited follow up to 1989's Pretty Hate Machine, but didn't appear on the 1994 album. He can be seen in the music videos for "Wish" and "March of the Pigs," as well as in the 1997 NIN concert film Closure.

He had earlier worked with Die Warzau, a Nine Inch Nails opening act, and subsequently returned to that band. Woolley collaborated with Rob Halford and Reznor in 2wo, and also led his own group called V.O.I.D.

"After his time with NIN came to a close, we moved into a house in Topanga Canyon, got married and started a family," Van Buren wrote. "Though our marriage ended, James always stayed close to his children." She added that Woolley had suffered from "significant neck and spine injuries" later in life.

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