Barinholtz's Suicide Squad co-star Jay Hernandez opened up to ET at the Bad Moms premiere in Los Angeles on Tuesday night about Barinholtz's new bundle of joy.
"We have a thread, the whole Squad is on this thread, so we randomly get pictures of him being you know...being dad," Hernandez told ET.
As for how he's doing the second time around, Hernandez gushed, "Adorable. He's doing fine!"
Though the baby's birth was kept under wraps, Barinholtz's brother-in-law did share on Facebook it's a girl and her name -- Payton! -- during a recent visit on May 27.
The newest Barinholtz joins 3-year-old big sister Foster. While the 39-year-old comedian and his wife announced they were expecting their second child in December, their new addition has managed to stay out of the limelight -- but not Barinholtz' Instagram.
"I'd trust him with my baby," the Suicide Squad star captioned a pic of what appears to be his little one with co-star Joel Kinnaman.
It seems Barinholtz already has a couple babysitters among his Mindy Project co-stars as well.
"It's a tie between [Adam] Pally and [Chris] Messina because they both have two kids and are amazing dads," the actor told Glamour when asked who he'd rather have babysit Foster. "I feel like Ed [Weeks] would somehow lose her. [In a British accent] 'I'm sorry! I don't know where she is! I dropped her off somewhere and lost her! I took her to the Soho House and started hitting on this girl and lost her!'"