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 Jami Gertz Marin Rosenthal Guest Star Jon Huertas Miguel Rivas Guest Star Ryan Michelle Bathe Yvette Guest Star Janet Montgomery Olivia Maine Guest Star Milana Vayntrub Sloane Sandburg Guest Star Molly Hagan Grace Guest Star Mackenzie Hancsicsak 9 Year Old Kate Guest Star Parker Bates 9 Year Old Kevin Guest Star Lonnie Chavis 9 Year Old Randall Guest Star Faithe Herman Annie Pearson Guest Star Eris Baker Tess Pearson Guest Star Ariana Vail Jemma Guest Star Jill Remez Ms. Gaither Guest Star Toni Christopher Mandy Guest Star Kevin Fabian Mr. Morrison Guest Star Dan Fogelman Executive Producer Jess Rosenthal Executive Producer Charlie Gogolak Executive Producer John Requa Executive Producer Glenn Ficarra Executive Producer