Colin confirmed his wife was pregnant with their first child together over the weekend while performing a standup gig in Connecticut.
According to Page Six, he told the audience: "We’re having a baby, it’s exciting," adding that he couldn't wait to be a dad.
Scarlett kept a low-key presence throughout the pregnancy, refraining from in-person interviews and only making appearances via Zoom from the shoulders up.
Jost himself acknowledged the feat in his announcement today, with his hashtag claiming "We got away with it for a long time," a testament to their efforts.
While Cosmo is the couple's first child together, Johansson also shares a six-year-old daughter, Rose, with her former husband Romain Dauriac—no doubt she'll now be happily taking up big sister duties.
Scarlett and Colin, who is an actor and comedian of Saturday Night Live notoriety, got married in October 2020.
The couple kept the occasion very private with only close friends and family present.