Twilight star Kellan Lutz and actress Sharni Vinson are back together Twilight star Kellan Lutz and actress Sharni Vinson are dating again after splitting in May. TWILIGHT star Kellan Lutz and actress Sharni Vinson are dating again after ending their 18-month romance in May. But US Weekly reports the lovebirds are keeping their reignited romance on the down-low. "They are back seeing each other, they do have a great time," a source said. They are trying to be fairly quiet about it, but they're not staying in a bunker or anything. Just a little more discrete. It's been a little difficult with him away filming, but he went to her birthday party recently and was such a great guy. They spent a lot of time together when in L.A. Just last month, Lutz, 28, wished Vinson, 30, a happy birthday on Twitter. Huge Happy Birthday to the amazing @sharnivinson (Sydney Time;)) and a Happy Birth Day to the wonderful @narellevinson for bringing such a beautiful soul into this world! The couple met during a chemistry reading for film Step Up 3D in September 2011.