While chatting with PEOPLE ahead of the release of The Odyssey<\/a>, the movie star, 55, revealed the secret to the couple’s 21-year marriage.<\/p>\n “Boy, I’ve always loathed to give any advice because I feel everybody’s different and everybody’s relationship is different,” he says.\u00a0<\/p>\n Matt Damon attends the premiere of ‘The Odyssey’ on July 14, 2026 in New York City. But when it comes to his own marriage, he adds, “There’s a lot of love and respect underneath the relationship, and a lot of trust. It’s built on a very sturdy foundation. We continue to grow and evolve as people, and so I guess that foundation’s really everything.”<\/p>\n Matt adds, “It’s the greatest thing in my life, but everybody’s different.”<\/p>\n The Hollywood power couple met in April 2003 and tied the knot two years later. They have welcomed three daughters<\/a> together, Isabella, Gia and Stella.<\/p>\n Matt is also dad to Luciana’s daughter, Alexia, whom she shares with her ex Arbello Barroso.<\/p>\n Luciana Damon and Matt Damon attend the 2024 Met Gala at The Metropolitan Museum of Art on May 6, 2024 in New York City. While they are husband and wife, the pair also collaborate together professionally.<\/p>\n Luciana has recently worked with Matt, producing his 2024 movie The Instigators and his 2026 crime thriller The Rip<\/a>. She is now producing his longtime friend Ben Affleck<\/a>‘s upcoming flick Animals.\u00a0<\/p>\n Notably, Luciana is a partner at Matt and Affleck’s production company<\/a> Artist’s Equity.\u00a0<\/p>\n Never miss a story \u2014 sign up for PEOPLE’s free daily newsletter<\/a> to stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories.<\/p>\n “She’s been a part of that for me since I’ve known her. She reads everything I’m doing. She looks at cuts of movies. I’ve really relied on her notes for 23 years,” Matt tells PEOPLE.<\/p>\n “While I was doing The Odyssey, she was producing the movie that Ben was directing and so they have their own work-life and creative, professional relationship. We have one altogether at the company, but they went off and did this movie while I was away and that’s great to see,” he says.\u00a0<\/p>\n Luciana and all four of their daughters showed up to support Matt at the London premiere of <\/a>The Odyssey<\/a> on July 6.\u00a0<\/p>\n Damon stars as Odysseus in Christopher Nolan’s newest movie based on Homer’s ancient Greek poem of the same name. The movie is out in theaters on Thursday, July 16.<\/p>\n For more on Matt Damon and The Odyssey, pick up this week’s issue of PEOPLE, available everywhere.<\/p>\n![\"Matt](\"https:\/\/www.newsbeep.com\/nz\/wp-content\/uploads\/2026\/07\/https:\/\/media.zenfs.com\/en\/people_218\/8ca57fa60dbaa9c37d03e88738cfd840.jpeg\"\/)
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Credit: Taylor Hill\/Getty<\/p>\n![\"Luciana](\"https:\/\/www.newsbeep.com\/nz\/wp-content\/uploads\/2026\/07\/https:\/\/media.zenfs.com\/en\/people_218\/fbe1caf2c132f603fed54d8f5c1b3742.jpeg\"\/)
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Credit: Dimitrios Kambouris\/Getty<\/p>\n