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When long divorced couple Don (Robert De Niro) and Ellie (Diane Keaton) get together for their adopted son Alejandro's (Ben Barnes) wedding to Missy (Amanda Seyfried), they think it will be a piece of cake. Even Don's current girlfriend Bebe (Susan Sarandon), and Don and Ellie's birth children Lyla (Katherine Heigl) and Jared (Topher Grace) think nothing of it. But when news comes about that Alejandro's incredibly Catholic birth mother is coming to the wedding arises, Alejandro has just one request of his parents...pretend to be married.

How to Watch The Big Wedding Legally and Safely

If you want to stream The Big Wedding through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry The Big Wedding films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.