Skip To ContentBrowse Audio DescriptionMoviesShowsLive SportsOriginalsBrandsCollectionsFree EpisodesSign InMoviesShowsLive SportsOriginalsBrandsCollectionsFree EpisodesMoviesShowsLive SportsOriginalsBrandsCollectionsFree EpisodesSign InSign UpSign InSign Up Now Ralph DrinkwaterPlayed by Michael GreyeyesA former classmate of Dominick and Thomas’, Ralph is now the janitor at Hatch Institute.About the SeriesI Know This Much Is TrueA family saga that follows the parallel lives of identical twin brothers in an epic story of betrayal, sacrifice and forgiveness.Learn MoreFeatured CharactersSee AllDominick BirdseyMark RuffaloThomas BirdseyMark RuffaloDessa ConstantineKathryn HahnJoy HanksImogen PootsMaMelissa LeoNedra FrankJuliette LewisRalph DrinkwaterMichael GreyeyesRay BirdseyJohn ProcaccinoYoung DessaAisling FranciosiLisa ShefferRosie OdonnellLeoRob HuebelDr. PatelArchie PanjabiYoung Dessa, Dominick and ThomasAisling FranciosiYou May Also LikeYears and YearsThe World Between UsEveryday PeopleThe Florida ProjectThe DaytrippersThe Color PurpleOn Becoming a Guinea FowlCinema VeriteHijos Del CarnivalThank You, Have a Nice DayWhen the Sun SetsShadows
