John Krasinski chats with ET's Rachel Smith about his new movie, 'IF,' in theaters on May 17. The actor, who wrote, directed, produced and starred in the film, opens up about the passion project and getting his friends to make cameos. John also shares how his wife, Emily Blunt, got a head start with making family-friendly movies like 'Mary Poppins' and 'Jungle Cruise,' and how he made it a point involve their kids throughout the whole creative process of 'IF.' Plus, John reacts to not returning as Reed Richards in the upcoming 'Fantastic Four' film, after previously playing the character in 'Doctor Strange in the Multiverse of Madness.'