Interstellar
(2014)

Cooper (McConaughey) signaled himself and his daughter Murph through variations in gravity and time that he could cause through fifth dimensions, after falling into the "Gargantuan" black hole in a far-away galaxy they flew to through a wormhole in Saturn's vicinity.

The wormholes and fifth dimension "Tesserect" were created in the future by descendants of humanity from a colony started by Brand (Hathaway) to allow Cooper to communicate the readings from inside a black hole to Earth, so Murph would develop the gravity-controlling technology to allow Earth's population to be saved.

Thanks Tom!