"I felt really out of my body," Paltrow says after giving birth. "I felt really disconnected. I felt really down ... I felt pessimistic."
Paltrow who also has daughter, Apple, 3 admits she didn't realize she had PPD until after the fact.
And, the golden girl isn't the first celeb to discuss her experience. To see how another actress was inspired by her bout with PPD, read more.