“Happy to share with the world our sweet little girl, Mayzel Josephine,” she captioned a photo of her adorable newborn on Sunday. “”[She] has captured our hearts and we couldn’t love her more … We are over the moon and soaking up so the cuddles and showering her with kisses!”

In another snapshot with the whole family, Mitchell, 39, wrote, “A proud family of 5!!!! Wow, never in my wildest dreams would I have predicted this growing up! I met my soul mate, Michael and we have created the most amazing family! My hearts 💖💖💖💖”

Mitchell and husband Michael Cameron are also parents to daughter Kenzie Lynne, 7, and son Hutton Michael, 5.

In March, the “7th Heaven” actress announced her pregnancy in an emotional post.

“We finally got our gold at the end of the rainbow,” she wrote. “We are pregnant with our rainbow baby.”

The road hasn’t always been easy but it is so worth it! It has been far but scarier this time around but just got a great checkup so we are feeling lucky. Not going to lie I may have peed on quite a few sticks because I couldn’t honestly believe it! But sure enough they all said PREGNANT.”

In November 2018, the 39-year-old actress revealed she’d miscarried twins earlier that year.

“A few months back Michael and I were thrilled, we had just found out we were pregnant,” she wrote on her blog, “Growing Up Hollywood.” “A few weeks later, our new dream of our growing family came crashing down; we had a miscarriage. This was a shock. Honestly, my first instinct was to say I was fine, and to be honest; I was trying to be. I thought I had to be, for my family, for myself. I had to jump on a plane and go to work being surrounded by babies and kids while I was still miscarrying. That was interesting.”

She continued, “This was the hardest part, suffering in silence. Every time I shared what we were going through I made people uncomfortable, no one ever knows what to say, and to be honest, there is nothing to say.”

At the end of the post, she thanked family and friends for being there for here, concluding that she hopes to have more children in the future.

“But for now, I look at my family and I am GRATEFUL, BLESSED, and THANKFUL,” she wrote.