Los Angeles, July 28 (IANS): Actress Maggie Gyllenhaal says she works as a shop assistant with her husband, actor Peter Sarsgaard at an organic food store because they are so passionate about eating healthy food.

The "Dark Knight" actress also says that both of them lend their spare time to a co-operative supermarket near their home in New York, where all employees are volunteers and receive heavy discounts on their groceries.

"We work at this place, it's a co-operative and if you work there you get cheap groceries. I don't do it because you get cheap groceries, I do it because they have incredible food and produce. You cannot just pay to be a member, you have to work there," femalefirst.co.uk quoted Gyllenhaal as saying.

"My husband works a lot of my shifts for me because he's really serious about it, but I do the odd shift. It's three hours and forty five minutes once a month, which seems like nothing, but for professional New Yorkers it's hard to figure out," Gyllenhaal added.

The 35-year-old, whose brother is actor Jake Gyllenhaal, prefers to remain inconspicuous while working at the supermarket and has recently transitioned from floor staff to a job in the basement.

"I've worked in the office, but I have a new shift now, down in the basement where you put the apricots in the little bags. You get in trouble really easy there. They have a lot of rules and I've missed shifts, but I try. I try. I've worked in the office before and people call up and lie," she added.