The crew of the International Space Station will take part in the first alien-to-astronaut phone call later today.
They will be contacted by ET to help publicise the release of the 20th Anniversary Edition of the film.
Children from schools in Florida will take part in the event and learn about life in space from the astronauts.
The initial call can be seen live on the internet between 3.15 pm and 3:20 pm UK time, and the entire event will be webcast at 8pm UK time.
ET: The Extra Terrestrial is re-released on March 29.