The duo, who separated in August, is privately working it out.

At the premiere of Michael’s movie last night, Last Vegas, he stopped red carpet interviews to take a call from Catherine, who wished him luck.

Later, at the after party at 21 Club, he was wearing his ring and was overheard telling his table mates she’s “great” and has moved back into their CPW apartment and they are working on saving their 13-year marriage.