Release dates
May 22, 2015 US

 
Synopsis and character list from Wikipedia

Frank (George Clooney) and Casey (Britt Robertson) travel to a place somewhere in time and space only known as Tomorrowland where their actions directly affect the world and themselves.
 
George Clooney as Frank Walker, a grizzled inventor
Thomas Robinson as young Frank Walker
Britt Robertson as Casey Newton
Hugh Laurie as David Nix
Raffey Cassidy as Athena
Kathryn Hahn as Ursula
Tim McGraw
Keegan-Michael Key
Judy Greer
Garry Chalk
 

Synopsis from Disney’s official page for Tomorrowland

From Disney comes two-time Oscar® winner Brad Bird’s riveting, mystery adventure “Tomorrowland,” starring Academy Award® winner George Clooney. Bound by a shared destiny, former boy-genius Frank (Clooney), jaded by disillusionment, and Casey (Britt Robertson), a bright, optimistic teen bursting with scientific curiosity, embark on a danger-filled mission to unearth the secrets of an enigmatic place somewhere in time and space known only as “Tomorrowland.” What they must do there changes the world—and them—forever.

Featuring a screenplay by “Lost” writer & co-creator Damon Lindelof and Brad Bird, from a story by Damon Lindelof & Brad Bird & Jeff Jensen, “Tomorrowland” promises to take audiences on a thrill ride of nonstop adventures through new dimensions that have only been dreamed of.