Shania Twain and Robert John "Mutt" Lange are separating, according to a spokesman from her record label. Twain and Lange were married on Dec. 28, 1993, and worked together extensively throughout her career.

Lange produced Twain's multi-platinum albums, and they co-wrote all of her charting singles for Mercury Nashville between 1995 and 2005, with the exception of "You Win My Love," in which Lange is listed as the sole writer. The couple has one son, Eja, born Aug. 12, 2001. They have maintained homes in Switzerland and New Zealand. "This is a private matter and there will be no further comment at this time," said Jason Owen, Twain's spokesman.

The couple met at Fan Fair in 1993, shortly after Lange had called Twain's label for her phone number, after hearing her debut album. They collaborated on the songs for her 1995 album, The Woman in Me. With the breakout songs "Any Man of Mine" and "(If You're Not in It for Love) I'm Outta Here!" the project has since been certified 12-times platinum. The 1997 follow-up album, Come On Over, included the Grammy-winning songs, "Man! I Feel Like a Woman," "Come On Over" and "You're Still the One." It has since been certified 20-times platinum, making it one of the best-selling albums in music history.

In 2002, Twain released Up!, which was certified 11-times platinum and released in three versions (pop, country and international). Greatest Hits (2004) surpassed quadruple-platinum status in April 2008. She has reportedly been working on a new album, but no release date has been set.

Lange had a firmly established career in rock music prior to meeting Twain. His producing credits include best-selling albums from AC/DC, Def Leppard, Foreigner and Bryan Adams. Following his success with Twain, he also produced successful albums by Celine Dion, The Backstreet Boys and The Corrs