Tell about a group of different people, some of whom have "the same birthday" in common, and their life stories are intertwined in interesting ways. Mandy Moore plays Rebecca, and Jack's lovely wife is also his best friend. She moved to Pittsburgh and gave birth to triplets. Milo Ventimiglia plays Jack. Justin Har tley plays Kevin, a handsome and popular TV actor with an unusually boring and unending single life. Sterling Brown plays Randall, a well-dressed family businessman who works in New York. He cooperated with his wife Beth to raise his two daughters. Susan Kelechi Watson plays Beth,Randall 's wife Ron Cephas Jones plays William, Randall's biological father. Abandoned Randall as soon as he was born. Chrissy Metz plays Kate, who, like many women, worries about diet and figure. ...