"Having kids is wonderful, and life changing, and rarely what you're prepared for. I love my children more than anything in the world," Gellar, 40, wrote alongside a sweet throwback photo of her holding her daughter, Charlotte, when she was just a baby. "But like a lot of women, I too struggled with postpartum depression after my first baby was born."
"I got help, and made it through, and every day since has been the best gift I could ever have asked for," she continued. "To those of you going through this, know that you're not alone and that it really does get better."