Watch Our Idiot Brother for Free: How to Stream the Movie Online at 123Movies. . Everybody has one—the sibling who is always just a little bit behind the curve when it comes to getting his life together. For sisters Liz, Miranda and Natalie, that person is their perennially upbeat brother, Ned. But as each of their lives begins to unravel, Ned's family comes to realise that Ned isn't such an idiot after all.