Signs is a 2002 American science fiction mystery thriller film written and directed by M. Night Shyamalan and produced by Shyamalan, Frank Marshall, Kathleen Kennedy and Sam Mercer. Synopsis: A former Episcopal priest discovers a series of crop circles in his cornfield, and slowly discovers that the phenomenon is a result of extraterrestrial life.

References:
https://en.wikipedia.org/wiki/Signs_(2002_film)