Ashton Kutcher is mourning the death of Brittany Murphy, who reportedly died Sunday morning of cardiac arrest.
He tweeted Sunday afternoon, "2day the world lost a little piece of sunshine. My deepest condolences go out 2 Brittany’s family, her husband, & her amazing mother Sharon."
The actor adds, "see you on the other side kid."
Kutcher, 31, and Murphy, 32, costarred in the 2003 comedy Just Married, and were romantically involved offscreen.