After a weeklong "Hoda-bration," Hoda Kotb's final day on 'Today' will be Jan. 10. Kotb's fourth-hour co-host, Jenna Bush Hager, also tells PEOPLE what she will miss most about working with her.

With Hoda Kotb preparing to exit Today in just a few days, Jenna Bush Hager is revealing the identity of her very first guest co-host on Today with Jenna & Friends. As Bush Hager told People, Scarlett Johansson will be joining her on the morning broadcast beginning Tuesday, Jan. 21, and she couldn't be more thrilled about working with the actress.

Nearly six years after becoming a literary heavyweight with “Read with Jenna,” she’s starting her own publishing venture with Penguin Random House.