It’s Axton Joseph Tyler!
Last month, she posted a photo with her son and famous father, Aerosmith frontman Steven Tyler.
The model-actress, 38, and her ex-boyfriend Dan Halen welcomed their son on May 10, she announced on social media.
“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. My son, Axton born May 10th at 5:45 am,” she announced.
Axton joined big cousins Milo, 12, Sailor, 2, and Lula, 1 — the children of Mia’s sister, model-actress Liv Tyler.