According to People, the Dancing With The Stars professional - who was previously connected to Kings Of Leon star Jared Followill - was spotted in the audience for Cook's performance at the Laugh Factory in Hollywood on Saturday.
"[He] kissed her and they quickly left together," claimed one source.
Another insider, who reportedly saw them dining together at Katsuya later that night, said: "They looked very happy together and very affectionate."
Representatives for Hough and Dane have yet to comment.
