<P> On September 27, 2016, NBC picked up the series for a full season of 18 episodes . In January 2017, NBC renewed the series for two additional seasons of 18 episodes each . The second season premiered on September 26, 2017 . </P> <P> The series follows the lives of siblings Kevin, Kate, and Randall (known as the "Big Three"), and their parents Jack and Rebecca Pearson . It takes place in the present and using flashbacks, at various times in the past . Kevin and Kate are the two surviving members of a triplet pregnancy, born six weeks premature on Jack's 36th birthday in 1980; their brother is stillborn . Believing they were meant to have three children, Jack and Rebecca, who are white, decide to adopt Randall, a black child born the same day and brought to the same hospital after his biological father abandoned him at a fire station . Jack dies when his children are 17 . </P> <P> Most episodes feature a storyline taking place in the present (2016--2018, contemporaneous with airing) and a storyline taking place at a set time in the past; but some episodes are set in one time period or use multiple flashback time periods . Flashbacks often focus on Jack and Rebecca c. 1980 both before and after their babies' birth, or on the family when the Big Three are children (at least ages 8--10) or adolescents; these scenes usually take place in Pittsburgh, where the Big Three are born and raised . Various other time periods and locations have also served a settings . As adults, Kate lives in Los Angeles, Randall and his family are in New Jersey, and Kevin relocates from Los Angeles to New York City . </P> <Ul> <Li> Milo Ventimiglia as Jack Pearson: Rebecca's husband, and Kate, Kevin, and Randall's father . </Li> <Li> Mandy Moore as Rebecca Pearson (née Malone): Jack's wife, and Kate, Kevin, and Randall's mother . </Li> <Li> Sterling K. Brown as Randall Pearson: Jack and Rebecca's adopted son, and Kate and Kevin's brother . Also played by Niles Fitch (ages 15--17) and Lonnie Chavis (ages 8--10). </Li> <Li> Chrissy Metz as Kate Pearson: Jack and Rebecca's daughter, and Kevin and Randall's sister . Also played by Hannah Zeile (ages 15--17) and Mackenzie Hancsicsak (ages 8--10). </Li> <Li> Justin Hartley as Kevin Pearson: Jack and Rebecca's son, and Kate and Randall's brother . Also played by Logan Shroyer (ages 15--17) and Parker Bates (ages 8--10). </Li> <Li> Susan Kelechi Watson as Beth Pearson: Randall's wife, and mother of Tess and Annie . </Li> <Li> Chris Sullivan as Toby Damon: Kate's husband . </Li> <Li> Ron Cephas Jones as William H. "Shakespeare" Hill: Randall's biological father . Also played by Jermel Nakia as a young adult . </Li> <Li> Jon Huertas as Miguel Rivas: Jack's best friend and Rebecca's second husband . (recurring season 1; main season 2--present) </Li> <Li> Alexandra Breckenridge as Sophie: Kate's childhood best friend as well as Kevin's childhood love and ex-wife . Also played by Amanda Leighton (ages 15--17) and Sophia Coto (age 10). (recurring season 1; main season 2--present) </Li> <Li> Eris Baker as Tess Pearson: Randall and Beth's older daughter . (recurring season 1; main season 2--present) </Li> <Li> Faithe Herman as Annie Pearson: Randall and Beth's younger daughter . (recurring season 1; main season 2--present) </Li> </Ul>

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