Eminem is in the studio and working out to get back into fighting shape.

The reclusive Detroit rapper “has been cutting new tracks with Dr. Dre,” a music insider said. “They still have a ways to go, but so far it’s really good.” The album should be out by the end of the year or early next year. By then, Eminem is expected to be looking lean and mean again.

After he was snapped by paparazzi packing on the pounds, he hired a personal trainer and is now working out daily to get rid of the extra weight. A rep said, “He’s always in the studio and has worked with a trainer before.”

WENN