In one heartwarming snap, the Saturday Night Live alum is seen holding up Malcom in the air. In another, the parents pose with pals comedian Dan Levy and Rachel Specter and their 5-month-old daughter Penny.
Olivia, 41, and John—whose relationship was made public last May following the the 39-year-old comedian's split from his wife of six years, Anna Marie Tendler—welcomed their first child together on Nov. 24, a day before Thanksgiving.
"It's been 4 months since the happiest, chillest baby came into my world," Olivia wrote on Instagram on March 24. "He wakes up smiling every single morning without fail, he loves bath time so much that he kicks his legs and looks around whenever he hears the sound of the tub filling up, his tiny fists are his favorite things to gum on and he squeals and follows along page by page whenever we read to him."
Keep scrolling to see more of Olivia and John's sweet family photos with son Malcom.