Lindsay Mendez Welcomes Baby No. 2, Her First with Husband J. Alex Brinson (Exclusive) ArticlePure

Lindsay Mendez is a mom again!

The actress, 41, who wrapped up a run in the revival of Merrily We Roll Along on Broadway this past summer, has welcomed her second baby, her first with husband J. Alex Brinson, a rep for the couple exclusively confirms to PEOPLE.

Their daughter, Ruby Beck Brinson, arrived on Thursday, Sept. 19. “We are absolutely over the moon to welcome our sweet baby girl to the world. With her, our family is complete,” they tell PEOPLE.

“Special shout out to my unbelievable husband, J., who is, without a doubt, my hero, valiantly serving and caring for all the women in this family and taking every step in stride,” adds Mendez. “I love you so dearly.”

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Mendez is also mom to 3-year-old daughter Lucy.

In March, Mendez shared that she was expecting her second baby, announcing the exciting news on Instagram.

Posting a photo of three pairs of matching shoes and one tiny pair of knit booties, Mendez shared her family’s happiness in her caption.

“Our family band is expanding! And we are bursting with joy! J and I can’t wait to make Lucy a big sister and welcome our new baby this fall,” Mendez wrote.

The star also took a moment to thank her cast, noting that she would be continuing to perform through the remaining shows.

“I’m also so grateful for the unrelenting support of my @merrilyonbway producers and company. Together, they have made it so that I can happily work safely, all while growing this true Broadway baby.”

“So, I will be continuing with the show, and finish the run on July 7th with my incredible cast. Come see (both) of us at the Hudson!” she concluded the post.

In April, Mendez and Brinson tied the knot in New York City. “It was a dream come true,” said Mendez of the nuptials. “Absolutely magical. J. is a magnet of love. A resilient, passionate, leader whom I’m excited to build a beautiful life with.”

The pair exchanged vows in front of 40 guests at Bethesda Terrace, which overlooks the southern shore of the lake in Central Park, followed by cocktails and a private dinner at the Lambs Club.