Superstar Shania Twain and mega-producer husband Robert 'Mutt Lange, are separating after 14 years of marriage, according to Twain's spokesman, Jason Owen of Universal Music Group Nashville.

"This is a private matter and there will be no further comment at this time," according to Owen.

The couple have a son, Eja D'Angelo (pronounced "Asia") who was born on August 12, 2001. Twain is 42 and Lange is 59.

She has sold 33.6 million albums in the U.S., according to Nielsen SoundScan. While Lange did not produce her first Mercury record in 1993, he has produced everything since. The pair also wrote virtually all of her biggest hits.

The label would not comment on whether or not Lange will be involved in Twain's next project, which is expected next year.

With 15.5 million, Twain's "Come On Over" is the biggest selling album in the U.S. since Nielsen SoundScan started in 1991.

Lange has also produced albums for Def Leppard, AC/DC, Foreigner and Bryan Adams, among others.