Alec Baldwin's wife, Hilaria, shares miscarriage on Instagram

Hilaria and Alec were married in 2012 and have four children together. Photo / Getty Images

Hilaria Baldwin, wife of SNL star Alec Baldwin, has shocked her social media followers when she shared some sad news in great detail.

The 35-year-old posed in front of a mirror selfie in her underwear — explaining that she was not only pregnant, but was "likely" in the process of losing her fifth child.

"I want to share with you that I am most likely experiencing a miscarriage," she wrote in an Instagram caption. "I always promised myself that if I were to get pregnant again, I would share the news with you guys pretty early, even if that means suffering a public loss."

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I want to share with you that I am most likely experiencing a miscarriage. I always promised myself that if I were to get pregnant again, I would share the news with you guys pretty early, even if that means suffering a public loss. I have always been so open with you all about my family, fitness, pregnancies...and I don’t want to keep this from you, just because it isn’t as positive and shiny as the rest. I think it’s important to show the truth...because my job is to help people by being real and open. Furthermore, I have no shame or embarrassment with this experience. I want to be a part of the effort to normalize miscarriage and remove the stigma from it. There is so much secrecy during the first trimester. This works for some, but I personally find it to be exhausting. I’m nauseous, tired, my body is changing. And I have to pretend that everything is just fine—and it truly isn’t. I don’t want to have to pretend anymore. I hope you understand. So, this is what is going on now: the embryo has a heartbeat, but it isn’t strong, and the baby isn’t growing very much. So we wait—and this is hard. So much uncertainty...but the chances are very, very small that this is a viable pregnancy. I have complete confidence that my family and I will get through this, even if the journey is difficult. I am so blessed with my amazing doctor, my dear friends, and my loving family...My husband and my four very healthy babies help me keep it together and have the perspective of how truly beautiful life is, even when it occasionally seems ugly. The luck and gratitude I feel that I am my babies’ mommy, is wonderfully overwhelming and comforting. In your comments, please be kind. I’m feeling a bit fragile and I need support. I’m hoping, that by sharing this, I can contribute to raising awareness about this sensitive topic.

A post shared by Hilaria Thomas Baldwin (@hilariabaldwin) on Apr 4, 2019 at 6:47am PDT

The yoga guru went on to explain what she was experiencing, explaining to her followers that she vowed to be as open as possible if she were to ever get pregnant again.

"I think it's important to show the truth … because my job is to help people by being real and open. Furthermore, I have no shame or embarrassment with this experience.

"I want to be a part of the effort to normalise miscarriage and remove the stigma from it. There is so much secrecy during the first trimester. This works for some, but I personally find it to be exhausting," she said.

Hilaria and Alec were married in 2012 and have four children together. Five-year-old Carmen Gabriela, three-year-old Rafael Thomas, two-year-old Leonardo Ángel Charles, and 10-month-old Romeo.

During an appearance on the Today show last year, Hilaria hinted at the possibility of growing her family.

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The only time we could have a little birthday celebration today for daddy’s birthday today was to visit him at work @jimmyfallon ! So we made a party in his dressing room 😂! Thank you @shumcake for the yummy cake...and for giving us superpowers 🦸🏻‍♂️🦸🏻‍♀️🦹🏼‍♀️🦸🏼‍♂️🦸🏼‍♂️🦸🏼‍♂️

A post shared by Hilaria Thomas Baldwin (@hilariabaldwin) on Apr 3, 2019 at 2:01pm PDT

"I have a daughter and then I have three boys. And my daughter is very sure that she is going to have a sister," she said.

"She does have a sister — she has Ireland, and Ireland is so wonderful and they have a great relationship," she mentioned, referring to Alec's 22-year-old daughter with Kim Basinger. "But there's something about a little sister that she really wants.

"I think it's possible. Alec thinks it's very possible. He comes from a big family." she added.

Hilaria was enjoying an evening out with her husband just the night before she shared her moving message, smiling for the camera at the FIT Annual Awards Gala.

The mum-of-four wasn't showing even a hint of a bump in her black tuxedo dress.