Mick Jagger’s longtime girlfriend, designer L’Wren Scott, hung herself Monday according to the New York Post.

She was found by her assistant hanging by a scarf inside the eighth-floor apartment at 200 Eleventh Ave. around 10 a.m.

A Jagger spokesman said the Rolling Stones singer is “completely shocked and devastated by the news.” The couple had been dating for a decade.

Scott, 47, designed dresses for a variety of stars including Nicole Kidman, Amy Adams and Angelina Jolie. A number of celebrities, including Bette Midler, mourned her death via social media.