Demi Moore and Ashton Kutcher are heartbroken after the 42-year-old actress suffered a miscarriage during her fifth month of pregnancy, The National Enquirer has learned.

The couple’s secret heartache was revealed as Demi showed off her toned new figure after a workout session at a West Hollywood gym. And while the tragedy has been devastating for the Hollywood duo, friends claim the ordeal has drawn the couple even closer together — and they are now planning a summer wedding in Malibu, California.

“Demi and Ashton are absolutely devastated,” said a source. “She was five months pregnant and was really looking forward to having a baby with Ashton.

“It was horrible for her. Ashton was there with her throughout the ordeal and was incredibly supportive. Demi was sure that everything was going to be okay because she was well past the dangerous first trimester. She was heartbroken.

“Demi thought she miscarried because of her age — but a doctor said that was absolutely not the case.”

Explained an insider: “Demi developed a problem with her placenta during her fifth month of pregnancy, and she miscarried and lost the baby.

“It’s rare for problems like this to occur in the second trimester, but it’s not without precedent. She was crushed at losing the little baby she wanted so much.”

The insider added that in anticipation of her new child, Demi had even added a baby wing onto her newly remodeled Beverly Hills home.

“Demi and her three daughters have been living with Ashton while her own home is undergoing remodeling,” said the insider.

“But she expected the remodeling to be completed by the time of her scheduled due date, which was to be this October.”

For the full story, pick up this week’s issue of The National Enquirer, on newsstands now.