The stars' relationship was revealed in September (12) after they were spotted kissing outside the moviemaker's London apartment.
Traviss publicly acknowledged his new girlfriend in December (12) when he praised her for supporting him after he was falsely accused of rape - but now it appears the romance has fizzled out.
Editors at Britain's Sunday People report the actress revealed at the U.K.'s National Television Awards on Wednesday (23Jan13) that the relationship was over, and a source adds, "Sheridan really liked Reg. They got on so well but things just didn't work out."
Traviss was dating Winehouse when she died from alcohol poisoning in 2011.