NYC commuters were treated to a surprise sighting — including an unexpectedly intimate moment — when Harrison Ford and his wife ... with second wife Melissa Mathison.

Harrison and Melissa first met in 1976 on the set of Apocalypse Now, when he was still married to Mary Marquardt. He and Mary got divorced in 1979, but it took a while for him to begin dating Melissa.

Harrison's marriage to Calista is his third. The star was previously married to Mary Marquardt, with whom he shares his two eldest sons, and Melissa Mathison ... his scheduled appearance at the ...