Currently you can stream the documentary Interstellar with a Netflix subscription in Australia. You can also stream the movie with Foxtel and Binge. We will update this page if we find more streaming options for Interstellar.
If you don't have Netflix, Binge or Foxtel then you can buy or rent Interstellar to watch online from a number of different digital platforms including Google Play Movies, Microsoft Store, Fetch and iTunes. It'll cost you as little as $4.99 to rent the documentary and $14.99 to buy the documentary to watch online.