You can watch the movie Step Brothers through several options:

• Streaming on Netflix (available in some regions) as part of their subscription service

• Renting or buying digitally on platforms like Amazon Video, Apple TV, Fandango At Home, Microsoft Store, Spectrum On Demand, and Google Play Movies. Rental prices are around $3.99 and purchase prices range from about $7.99 to $14.99, often in HD or 4K quality

• It will also be available on Amazon Prime Video (including Prime Video with Ads) starting March 17, 2025

• Additionally, it can be streamed on Roku through Prime Video or Fandango Now

If you want to watch it immediately, renting or buying on one of the digital stores listed above is the quickest way. Netflix is an option if you have a subscription and it is available in your region.