Looks like the mystery brunette with whom Guy Ritchie has repeatedly been seen out and about this summer has been identified. The London Daily Mirror says she's Mellany Gandara, a -- color us shocked -- model and actress who had a bit part in "Iron Man." The pair, who were photographed together at the director's Punchbowl pub in London last week, supposedly met through Robert Downey Jr., who is starring in the Ritchie-helmed flick "Sherlock Holmes." Meanwhile, the New York Post reports Madonna's own younger model, Jesus Luz, is still determined to become a professional DJ, and she's doing whatever she can to support his record-spinning dream. "Madonna and her friends are trying to get him established," relays a source. "He really wants to be more than just a model." In June, reports surfaced that the ex Mrs. Ritchie had shelled out about $50,000 on DJ equipment for her 22-year-old companion, who was snapped grabbing some rays over the weekend on a beach in his native Brazil.