Dancing with the Stars” finalist RICKI LAKE is hiding a shock­ing secret– she was pregnant at age 42!

Ricki, who’s now 43, discovered she and her fiance Christian Evans were going to have a baby shortly before she was approached to do the hit show.

But then she lost the child in a heartbreaking trage­dy, The ENQUIRER has learned.

The bubbly actress and talk-show host didn’t plan to get pregnant by the handsome jew­elry designer, but they were delighted with the baby news, revealed a close source.

Sadly, their joy soon turned to tears.

Losing the baby “devastatedRicki, confided the source.

“She was sick over it – and Christian was as well,” said the source.

“He’d been so happy when he got the news that Ricki was go­ing to have his baby.

“When she lost the child, they were both crushed – and in tears!”