Mandy Moore Rebecca Pearson Actor Milo Ventimiglia Jack Pearson Actor Sterling K. Brown Randall Pearson Actor Chrissy Metz Kate Pearson Actor Justin Hartley Kevin Pearson Actor Chris Sullivan Toby Damon Actor Susan Kelechi Watson Beth Pearson Actor Ron Cephas Jones William Actor Jon Huertas Miguel Rivas Guest Star Virginia Kull Samantha Guest Star Brian Oblak Joe Guest Star Jermel Nakia Young William Guest Star Lonnie Chavis 9 Year Old Randall Guest Star Susan Blakely Anne Guest Star Chad Morgan Alli Katowski Guest Star Mike Bradecich Peter Katowski Guest Star Gerald McRaney Dr. Nathan Katowski Guest Star Mackenzie Hancsicsak 9 Year Old Kate Guest Star Parker Bates 9 Year Old Kevin Guest Star Stewart Skelton Father Williams Guest Star Kraig Dane Fireman Guest Star Rob Chester Smith Tony Guest Star John Gloria Carl Guest Star Erica Shaffer Mother Guest Star Dan Fogelman Executive Producer Jess Rosenthal Executive Producer Charlie Gogolak Executive Producer John Requa Executive Producer Glenn Ficarra Executive Producer