Olivia Munn and John Mulaney's baby boy is officially half a year old! The 41-year-old actress celebrated her son's half bday on Tuesday with a smiley Instagram snapshot of her and Malcolm lounging on a blanket outdoors. Olivia shared in her caption some of Malcom's favorite things and concluded by revealing how much joy he has brought to her and John's life. "Happy 6 months being earthside with us. You lit up our whole world," she wrote. Olivia and John welcomed Malcolm back in November 2021.