Could “Entourage” star Kevin Connolly be romancing Chloë Sevigny? They were spotted looking “very much like they were on a date” at Nobu 57 the other night. A spy said, “She was very dressed up and looked stunning. They went outside for a cigarette, where they seemed clearly interested in each other.” Connolly is getting a reputation as an unlikely Casanova, having romanced Nicky Hilton and Julianne Hough of “Dancing With the Stars.” He was also linked to Hayden Panettiere although they denied it. Connolly’s rep declined to comment. Sevigny’s rep said, “I do not comment on Chloe’s personal life.”