Michelle Pfeiffer has revealed what she loves to indulge in when not sticking to her diet.

The 54-year-old actress looks in amazing shape and is starring in new movie People Like Us.

And she told People magazine that she doesn't mind treating herself to a few naughty treats now and again.

"A big bag of theater popcorn and a medium Coke," she said of her ideal snack. "It's my favourite thing in the world. You have to have real Coke."

The Hollywood star also told the publication about the last time she cried.

"I howled for about a week after I dropped my daughter [Claudia Rose, 19] off at college," she shared.

"But I had to grieve, and she needed to separate. It's all good now."

And although the blonde beauty has been in showbiz for a couple decades, she still has awkward moments being in the limelight.

"Just now in the elevator, there was a man with his two young daughters and he asked me to take a picture with them," she laughed.

"One of them said, Who is she?' The dad was so busted. They asked me if I was famous, and I said, A little bit,' which excited them even though they had no idea who I was."