Kim Porter, who was mother to three of Diddy's children, has died aged 47.
The LA County coroner confirmed the news, saying she "was discovered unresponsive in her home" and pronounced dead at the scene on Thursday.
They added: "At this time, an autopsy is pending and a cause of death has not been determined."
Celebrities including Rihanna, 50 Cent and Missy Elliott have been paying tribute to her on social media.
The model and actress dated the American rapper on and off from 1994 to 2007 and they had three children together: twins Jessie James and D'Lila, 11, and son Christian, 20.
She also had a 27-year-old son, Quincy, from a previous marriage.
bbc.com
