Matt Sayles / Invision/AP 1 / 4
Matt Sayles / Invision/AP 1 / 4

Brad Pitt and Angelina Jolie hit up a suburban grocery store with two of their kids Saturday afternoon, a Stop & Shop employee tells Usmagazine.com.

"They were here for 30 minutes and left," Monira Ahmed, who works in customer service, tells Us of the pair -- who are staying on New York's Long Island while she films thriller Salt.

See a photo of Brad and Angie at the grocery store!

"They were very friendly," continues Ahmed of the couple, who were joined by Zahara, 4, and Shiloh, 2. "They gave autographs and allowed people to take pictures of them inside...very nice."

Check out adorable photos of Angie and her kids.

Jolie was dressed down and "looked ordinary -- not too much makeup. They were simple and humble."

See what stars look like without makeup.

Pitt -- who donned a newsboy cap -- pushed the cart while Jolie followed behind them as they shopped in the produce, fish and meat sections, Ahmed says.

Earlier this week, Diane Kruger -- who costars in Inglourious Basterds -- called the Jolie-Pitts "such a sweet family!"

See what Angie looks like all glammed up on the red carpet.

Despite having six kids, Pitt always "seemed pretty fired up!" Kruger added. Jolie "was lovely -- very positive energy. She's beautiful!"