Actor Kellan Lutz has cleared up rumours he is dating singer Miley Cyrus, insisting he's just "friends" with the provocative pop star. The Twilight star hit headlines in December (13) when he was seen cavorting with the Wrecking Ball hitmaker in Las Vegas. Cyrus denied the new romance reports at the time and now Lutz is speaking out. He says, "It just makes me laugh. I've been friends with Miley for, like, six years. She's a great girl...We are friends (and) we run in the same circle." He adds, "Are we dating? No, I'm happily single... I'm not (looking for a relationship) right now. I'm enjoying life and travelling quite a bit... There's no real time to find the one." The actor split from girlfriend Sharni Vinson in May (13) before reuniting and splitting with her again over the summer (13). Cyrus called off her engagement to Aussie star Liam Hemsworth in September (13).