"To hit the big screen" means that something, such as a movie, is being released or shown in movie theaters instead of being seen on a smaller screen like a television or computer. Full definition
We've seen plenty of live - action fairy tales hit the big screen in recent years, but most of those movies are content to include tell just one story. (slashfilm.com)
Plenty of movies are based on books, but many hit the big screen with their names changed. (visualnews.com)
Adventure, Action - The heroes on the half - shell hit the big screen again in this adaptation of the comic book franchise. (ign.com)