Peter Facinelli and Lily Anne Harrison’s baby boy made his adorable Instagram debut on Monday.
“Felt Cute. Might delight later,” the “Twilight” star, 48, captioned a sleepy snap of the infant.
“Happy 1 week Birthday Jack. 💪🏻❤️,” the actor went on to write before revealing his son’s full name: “Jack Cooper Facinelli ⭐️.”
Facinelli’s former co-star Nikki Reed gushed about his newborn in the comments section.
“I love him so much is it too soon for kisses from Aunty Nik?” the actress, 34, wrote.
Harrison, 33, reposted Facinelli’s social media upload to her Story, writing, “My lil angel boy.”
The screenwriter gave birth to her and the “Nurse Jackie” alum’s first child together on Sept. 5. The little one joined Luca, 25, Lola, 19, and Fiona, 15, whom Facinelli shares with ex-wife Jennie Garth.
“Happy ‘Labor’ Day @lilyanneharrison ❤️,” the proud dad wrote alongside a black-and-white photo of Jack’s hand last week. “Sept 5th, 2022 🍼👶🏼.”
The infant arrived three months after Harrison showed her Instagram followers her baby bump.
“Not a burrito belly 💗,” the then-expectant star captioned a June selfie.
Facinelli jokingly commented, “You’re pregnant? 😳 Why didn’t you tell me?”
The “Supergirl” alum began dating Harrison in 2019. He proposed in January of the following year during a Mexico vacation, but the pair have postponed their wedding multiple times due to the COVID-19 pandemic.
Prior to their romance, Facinelli dated Jaimie Alexander. While he and his “Loosies” co-star, 28, got engaged in 2015, the former couple never made it down the aisle.
As for Facinelli and Garth, 50, the exes were married from 2001 to 2013.
Discussing their divorce in a 2017 LaPalme Magazine interview, the “Fastlane” alum said that he and the former “Beverly Hills, 90210” star have been able to move forward with “love and respect” with their children in mind.
“As long as mom and dad are happy, the kids are happy,” Facinelli explained at the time. “Anyone going through a breakup should know [that].”