updated 12/19/2011 AT 2:00 PM ET
•originally published 12/19/2011 AT 4:00 PM ET
Actress Jessica Lange and her longtime partner, playwright and actor Sam Shepard, ended their relationship almost two years ago, PEOPLE has learned exclusively.
The couple, who have been together since 1982, have two children, Hannah and Samuel, together.
“They both are pursuing independent lives,” says a source.
Lange, 62, who stars as Constance in FX’s hit series, American Horror Story, was just nominated for a Golden Globe and Screen Actors Guild award. She will be seen next in The Vow, costarring Rachel McAdams, in February.
A rep for Lange confirms the split – but has no additional comment. Shepard’s rep could not be reached.