Roc married for the first time at 24 in 1939, to the 44-year-old Canadian osteopath Dr. Murray Laing - they divorced only a few years later. She married again in 1949 to André Thomas, and moved to Paris, starting to work more and more in French and Italian cinema (along with a French-Canadian feature in Quebec). Thomas was unable to have children and so, when Patricia gave birth to Michael as a result of an affair with Anthony Steel in 1952 (while they were co-starring in Something Money Can't Buy), Thomas agreed to raise him as his own. Thomas died in 1954., and

She married a third and final time, to Walter Reif, in 1962, and a year later retired. During her retirement, she moved to Locarno, where she later died of kidney failure.