Kate Hudson and Hugh Jackman feel like a real-life married couple after playing on-screen love interests in their new film, “Song Sung Blue.”

“We only shot for 36 days, but it really does feel like we were married [for] a long time,” Jackman joked to Page Six exclusively at the 2025 Gotham Awards.

Hudson agreed with the sweet sentiment.

Hugh Jackman and Kate Hudson joked that they feel like an old married couple after filming “Song Sung Blue.” Page Six

The pair play a couple who perform in a Neil Diamond cover band. Sarah Shatz/Focus Features

“Yeah, we were married a very long time!” she exclaimed.

The “Running Point” star added that the atmosphere on set was satisfying because “it was so easy for us … the work was fun.”

“We enjoyed the experience together. It was like, safe and trusting, and that made it fun,” she said, noting that Jackman — who had been attached to the project before there was a script — fostered a warm atmosphere.

The “Almost Famous” star said that they both enjoyed the experience of working together. Page Six

Hudson admitted she had no idea how many hit songs Diamond had written before she began filming. Getty Images for Keep Memory Alive

“Song Sung Blue” is based on a documentary about musicians — Mike Sardina aka “Lightning,” played by Jackman and Claire Sardina, aka “Thunder,” played by Hudson — who launched a Neil Diamond tribute band.

The “Almost Famous” star, 46, admitted that before filming she “had no idea” Diamond’s catalogue “was so extensive.”

Jackman, 57, said he’s a huge fan of the “Sweet Caroline” crooner, calling him “one of the greats of all time, and he’s one of the great songwriters.

“If he never stepped on a stage, he’d be an icon, but he’s actually one of the great performers, and that’s not a given, I don’t think.”

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Jackman hopes the movie will reintroduce Diamond to a new generation. WireImage

The “Wolverine” star earlier walked the red carpet with his girlfriend, Sutton Foster. FilmMagic

The “Les Misérables” star hopes their film will “actually generate a whole new wave of interest in his music.”

Earlier in the evening, Jackman walked the red carpet with his girlfriend, Sutton Foster, 50. They went Instagram-official last month.

“Song Sung Blue” hits theatres on Christmas Day.