Darren Criss and wife Mia Swier welcome their second baby

Darren Criss and Mia Swier welcomed their second baby. Instagram/@darrencriss

Bluesy is a big sister!

Darren Criss and Mia Swier’s second child, a baby boy, has arrived, with the “Glee” alum’s wife giving birth to baby No. 2 on June 3.

“M & D just delivered their follow-up single,” Criss announced on Instagram Thursday alongside a sweet snap of their newborn swaddled in a “Star Wars”-themed blanket with R2D2 on it and sunglasses over his face.

“Brother László Criss,” they wrote in the caption with star emojis around his name. “🎶 Out now. 🎶”

Brother László Criss was born on June 3. Instagram/@darrencriss They concluded their post by confirming their son’s name is Brother. Instagram/@darrencriss

They concluded the post by confirming, “… and yes his first name is Brother 💛”

Several of Criss’ “Glee” co-stars congratulated him in the comments section with Kevin McHale writing, “Congratulations 😭😭😭”

“Yeeeeesssss! So happy for you growing Family!! Love you all!” Matthew Morrison commented.

The couple revealed their pregnancy news in December 2023. Darren Criss/Instagram “Coming soon,” the “Glee” alum wrote. Getty Images

The actor, 37, became a dad in April 2022 when daughter Bluesy was born.

“M & D made some sweet music,” Criss wrote alongside hospital photos at the time, quipping that their collab was “out now.”

He used an edited “Mamma Mia: Here We Go Again” movie poster to announce in December of the following year that he and Swier, 38, had another little one on the way.

The couple are already the parents of daughter Bluesy. Darren Criss/Instagram She was born in 2022. Darren Criss/Instagram

“And COMING SOON…let’s hope the sequel is better than the photoshop,” he joked of the December 2023 upload.

The doctored snap featured his face on Meryl Streep’s body, with Swier and Bluesy as Amanda Seyfried and Lily James, respectively.

Criss loves being a father, telling “Entertainment Tonight” in June 2022 that his experience has been “beautiful” and “wonderful.”

The actor believes he has “leveled up” since becoming a dad. GC Images Criss married Swier in February 2019. Future Publishing via Getty Images

He gushed, “[As] a son, as a friend, as a brother, as a husband … I bring that to all the things that I do. So sure, a new element of fatherhood is there.

“Hopefully I’ve enhanced. I’ve leveled up,” Criss continued.

The Golden Globe winner and Swier began dating in 2010, four years after they met through mutual friends.

They met in 2010 and started dating four years later. Getty Images Criss proposed in 2018. Getty Images for Tony Awards Productions

The duo got engaged in 2018.

The duo walked down the aisle in February 2019 in a New Orleans ceremony attended by Lea Michele, Chord Overstreet and more of the groom’s former co-stars.

The Broadway star called their nuptials the “best” day of his life while celebrating their anniversary five years later.