Rachel McAdams was the belle of the ball as she hit the red carpet for the New York premiere of her new movie Southpaw. The 36-year-old True Detectives star showed off her toned tummy in a black cut out skater dress. Finishing her glamorous look with barely there black sandals and fresh-faced make up. The blonde beauty joined her handsome co-star Jake Gyllenhaal, cozying up to him on the red carpet at the Lincoln Centre venue. The film charts the life of boxer Billy Hope, played by Gyllenhaal, who loses his family and fortune and has to come back from the brink with the help of an unlikely savior. Joining Rachel and Jake on the red carpet were costars Forest Whitaker, Naomie Harris and Curtis '50 Cent' Jackson.