Chiwetel Ejiofor splits from girlfriend Sari Mercer

"12 Years a Slave" star Chiwetel Ejiofor is single again after he reportedly broke up with his model girlfriend Sari Mercer.

No further details about the couple's separation is known, reported Daily Mirror.

Meanwhile, a source has been quoted as saying, "It's sad but the relationship came to a natural end. Sari was always such a big part of his life so it was definitely a big surprise to hear they had separated."

There hasn't been official statement issued by both 38-year-old Ejiofor and Mercer.

Their representatives also have not commented on the report just yet. The pair were last seen together at this year's Oscars.