Darren Criss and Wife Mia Welcome Baby No. 2 as They Joke They Delivered Their 'Follow-Up Single'

Darren Criss' family has grown by one more!

The American Crime Story alum, 37, and his wife Mia welcomed their second baby together on Monday, June 3, sharing a photo of their baby boy on Instagram.

In the sweet photo, the couple's new addition wears a huge pair of sunglasses as he's swaddled in a blue blanket with Star Wars' R2-D2 on it.

"M & D just delivered their follow-up single. ⭐️ Brother László Criss ⭐️ 6/3/24 🎶 Out now. 🎶 ," Criss wrote in his caption.

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In December, the singer and actor shared that he and Mia were expecting another baby together, announcing the news on his Instagram account.

Criss posted an edited photo of his face, his wife's, and his daughter Bluesy Belle's face on top of the Mamma Mia: Here We Go Again promotional movie poster. Along with the edited movie poster, the Instagram photo included two positive pregnancy tests confirming the couple’s news.

“And COMING SOON…let’s hope the sequel is better than the photoshop.✌️🤪 ‼️," Criss wrote in the caption.

Criss and Mia welcomed their first baby in April 2022, daughter Bluesy Bell, and shared that they were expecting in October 2021.

"We've been making music for years.⁣⁣…" Criss wrote on Instagram. "But this time we made a BEAT.⁣⁣ The ultimate collab droppin' Spring 2022."

The couple tied the knot on Feb. 16, 2019, in front of their friends in family in New Orleans. "That was one of the most incredible events of my entire life," Criss told PEOPLE in April 2020.

"The most magical experience. Say what you will about the construct of marriage and tradition: weddings are amazing."