In theaters August 22nd. Advance tickets now on sale! Mia Hall (Chloë Grace Moretz) thought the hardest decision she .br IfIStay.br Subscribe to TRAILERS: Subscribe to COMING SOON: Like us on FACEBOOK: If I Stay Official Trailer .br In theaters August 22nd. Mia Hall (Chloë Grace Moretz) thought the hardest decision she would ever face would be whether to pursue .