The Tyler family just got a little bigger!
"The love of my life has finally arrived and I am now complete. No words can explain how I am feeling. Just pure unfiltered love," the 38-year-old actress captioned the first photo of herself cuddling her newborn son.
Later on Wednesday, Mia took to Instagram again to share seven new snapshots of baby Axton meeting his family. "Best day of my whole entire life. I'm so grateful for my family and my lover for being here and being so supportive. And to the friends and family that came to welcome our new lil wolf cub, Ax, into the pack," she captioned the slideshow of pics.
Mia's dad, Steven, previously confirmed in November 2016 that his daughter and her boyfriend were expecting their first baby together. "My baby is having a baby!" the 69-year-old Aerosmith rocker wrote on Instagram.
Steven and Mia in December 2015.
Steven welcomed Mia with his first wife, Cyrinda Foxe — whom he was married to from 1978 until 1987 — back in 1978. He's additionally a father to actress Liv Tyler, 39 (from a previous relationship with Bebe Buell), and to daughter Chelsea Anna Tallarico, 28, and son Taj Monroe Tallarico, 26 (with his second wife, Teresa Barrick, whom he divorced in 2006).
Baby Axton joins Steven's three other grandchildren: Milo, 12, two-year-old Sailor, and nine-month-old Lula Rose.
Check out the gallery to see more photos of famous grandparents with their adorable grandchildren!