The pair - whose split last June was said to have triggered Owen's suicide attempt in August - openly held hands as they went to a cinema in Miami last week.
A source told America's OK! magazine: "They had a date night at Regal Cinemas South Beach. They got dropped off on Lincoln Road and held hands as they walked a few blocks before heading into the theatre. Once the movie was over, they drove off to Owen's Star Island house."
This is the first time Owen and Kate have been photographed together since their rumoured reunion at the Oscars in February. They are also said to have spent Easter in Miami's Biscayne Bay together - with Kate's four-year-old son Ryder.
The pair were seen on a bike ride in South Beach on Saturday (22.03.08), before stopping at Starbucks for a coffee. A source said: "They looked like a family on an afternoon outing, taking advantage of the balmy weather and doing some errands."
Owen is currently in Miami shooting his new movie 'Marley and Me' alongside Jennifer Aniston.
The source added: "They are trying to keep it low-key, but when Kate is in Miami, it is to see Owen."
Kate, 28, and Owen, 39, began dating in 2006 after meeting on the set of romantic comedy 'You, Me and Dupree'.
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