Catherine Zeta-Jones reveals curious work habit as she shares behind-the-scenes glimpse from latest project

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Catherine Zeta-Jones. It's been a while since the star was last on a film set, her last project having been 2016's comedy Dad's Army, but some work traditions remain the same.MORE: Catherine Zeta-Jones' go-to face cream is 42% off in the Amazon sale - hurry!The actress took fans behind-the-scenes as she worked on a new project, and detailed her longtime habits while on set.She shared a candid selfie video from an impressive kitchen, taking viewers along as she enjoyed her well-deserved lunch break.WATCH: Catherine teases daughter Carys in sweet clipMORE: Catherine Zeta-Jones shocks lookalike daughter in new videoCatherine gave fans a glimpse of what she gets up to during her down time, which apparently has been the same for decades.

She appeared listing ingredients, revealing to fans what has always been her go-to lunch."It's lunch time on set…" she began the video with, as she raised towards the camera a plastic carton full of salad greens.She went on to search through her bag of ingredients, listing them one by one as she took them out and showed them.

It seems like her preferred meal while on set is a tuna salad of sorts, as she listed olive oil, balsamic vinegar, a tin of tuna, cucumber, two tomatoes, and an apple.A post shared by Catherine Zeta-Jones (@catherinezetajones)Catherine's behind-the-scenes glimpseThe clip concluded with her looking at the camera and saying: "That's it.