United Kingdom, July 8 -- Keke Palmer found it "really, really hard" to regain her pre-pregnancy figure.

The 31-year-old actress - who has a two-year-old son called Leo with Darius Jackson, her ex-partner - has revealed that she had to workout diligently to get back in tip-top shape.

The Hollywood star told People: "You have to get back to yourself after the baby. It's really, really hard.

"Anybody with kids knows sometimes it can take three, four, five years. It really wears your a** out."

Keke revealed that Pilates has been key to her workout routine.

The actress shared: "I'm a Pilates girl down, I don't care. It's the Pilates. And I need people to know it doesn't matter what that scale says. It matters about the muscles. That's wh...