Scarlett Johansson Reveals Son Cosmo, 3, Is a Chappell Roan Fan, and He Can’t Get Enough of This Song Scarlett Johansson Reveals Son Cosmo Is a Chappell Roan Fan – Scarlett Johansson is sharing rare comments about her son. While speaking with MTV UK at the London premiere of Jurassic World Rebirth on Tuesday, June 17, the actress, 40, gave …