The pair announced their plans to divorce last month following claims that Kutcher slept with 22-year-old Sara Leal on the weekend of his sixth wedding anniversary. They are said to have bumped into each other at a private members' club where Moore was dining with a male companion.
'It didn't look romantic at all,' an onlooker told Us Weekly about the dinner, adding that Moore eventually spotted Kutcher over the other side of the room.
'She approached his table. He gave her a hug, and they spoke for a few minutes,' said the witness. '[The meeting was] very awkward.'