Nicole Richie, Ex-Fiancé Split &#151 Again

After an on-off-on-again relationship, "Simple Life" star Nicole Richie and her ex-fiancé Adam Goldstein have officially split.

"We are confirming that we have amicably separated," the pair said in a statement released Monday by Richie's publicist, Cindy Guagenti. They did not provide any details of the break-up.

Richie, 24, and Goldstein, a professional club DJ who goes by the name DJ AM, called off their engagement in December.

The two were spotted together again a few months later, and Richie confirmed their couple status in an interview for the June issue of Vanity Fair.