Will Arnett and his girlfriend Alessandra Brawn are expecting their first child together.

US Weekly was the first to report the happy couple's news, with an insider telling the publication that the couple are "very happy and thrilled." Arnett and Brawn are thought to have been dating since 2019. The Arrested Development actor shares sons 11-year-old Archie and nine-year-old Abel with his ex wife, Amy Poehler. Brawn and her ex-husband Jon Neidich split in 2018 and have a son, Nash. The actor previously gushed to the publication about how being a parent is "the greatest thing ever." “There’s nothing like [being their father],” he said in 2018. “It’s the greatest thing ever. There is no other single thing in my life that is even in the same category.” The 49-year-old is also the host of the series Lego Masters and recently spoke to Parade about how he took on roles in Teenage Mutant Ninja Turtles and The Lego Movie because he wanted something his kids could see. "I started making the deal that I would do one for them, one for me. With BoJack Horseman, my kids were like, 'Can we watch BoJack?' And I’m, 'Absolutely not,'" he said. "They’re 9 [Abel] and 11 [Archie]. Then I did Lego, and then my show Flaked—which I’m also like, 'No, you can’t watch it.' Then I did Ninja Turtles. It’s worked out really well."