Tracy Mosby is the title character from the CBS television sitcom How I Met Your Mother. The show, narrated by Future Ted, tells the story of how Ted Mosby met his children's mother. Tracy McConnell appears in eight episodes, from "Lucky Penny" to "The Time Travelers", as an unseen character; she was first seen fully in season 8 finale "Something New" and was promoted to a main character in season 9. She is played by Cristin Milioti.

Theodore Evelyn Mosby is a fictional character and the protagonist in the American sitcom How I Met Your Mother, portrayed by Josh Radnor. He serves as the show's narrator from the future, voiced by Bob Saget, as he tells his children the "long version" of how he met their mother.