‘Dancing With The Stars’ Derek Hough and Stephanie Pratt now dating. The pair was seen making serious moves on each other at Hollywood, Calif. nightclub, Beacher’s Madhouse on Wednesday night, an eyewitness confirmed to Celebuzz. “They were holding hands, kissing… hooking-up in front of everyone,” one partygoer revealed.

Until recently Hough, 27, — brother of Rock of Ages star Julianne Hough — had been romantically linked to his former Dancing With The Stars competitor opera singer Katherine Jenkins, 31. But, according to the eagle-eyed partygoer, three-time Mirror Ball trophy winner Hough was not acting like there was anyone else but The Hills star in his life.

“They were definitely into each other,” the onlooker said. “She was all over him at one of the tables  — they were making out in front of everyone.” But the 26-year-old MTV star might find herself with some explaining to do to her on-screen friend Lauren “LC” Conrad, also 26, who was dating Hough up until November.