Emily Blunt and John Krasinski have made several memorable appearances on "The Tonight Show Starring Jimmy Fallon," where their chemistry and humor shine through. Their playful banter and engaging stories have delighted audiences, making their segments particularly popular. The show's format allows for lighthearted games and interviews, which perfectly showcase their dynamic as a couple, further endearing them to fans. This combination of fun interactions and the show's late-night appeal has solidified their status as favorite guests on Fallon's program.