The Sun was the first outlet to report the couple's separation. No further details were revealed though. 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."
At the time of writing, there hasn't been official statement issued by both 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.
Personal life aside, it was reported in June that Ejiofor is expected to play Baron Mordo, the villain character in Marvel's new superhero movie "Doctor Strange". The film is slated for November 4, 2016 US release.