And fans couldn't be happier for the couple, with users congratulating the pair in the comments section.

"Congratulations!!! Such a fun way to tell us!" a fan wrote, while another said, "wait i loved this reveal."

Since welcoming daughter Holland in May 2023, Ireland has been open about the challenges she faced in both her pregnancy and postpartum journeys, including how it impacted her mental health.

"I really struggled in my pregnancy as many of us do. Not just by puking everywhere," she wrote in a May 2023 Instagram post. "As someone who suffers tremendously from health anxiety, pregnancy shifted everything into overdrive. Every thought in my head pertained to hurting the baby. Hurting myself."

The screenwriter emphasized that everything changed once Holland was born.

"When she was born, all of this dissolved into nothingness," she recalled. "Nothing ever mattered until that moment. The delivery was intense, but I've been in worse pain. She was born. My fears fled."

As for her advice for expectant mothers or new moms, she said, "Don't let people tell you how it's going to be," she reflected. "Life is scary and unpredictable and this process was terrifying but it's the greatest thing I've ever done and will ever do."

And Ireland—who began dating RAC in 2021—expressed her gratitude for having the musician at her side through it all, writing, "We make an even better team than I imagined."

And as the pair wait to become a family of four, read on to see other stars who welcomed babies this year...