Gere, 64, and Lowell, 52, were a couple for seven years before they wed, but they haven't been photographed together since a screening of Gere's movie "Arbitrage" last year, the newspaper said.
A source told the Post the couple -- who have a son -- have "been spending time apart for quite some time."
"They have a place in Bedford [New York], and he likes it because it's quiet and he likes the solitude," a second insider told the newspaper. "She likes being in North Haven in the limelight. They live next door to Jimmy Buffett and his family, and they're good friends."