Shia LaBeouf has been very upfront about the fact that Honey Boy is all about him working out his daddy issues. That's why he plays James, a not-at-all-veiled version of his real-life father, Jeffrey LaBeouf, opposite Noah Jupe as Otis, a.k.a. young Shia. But who is that on the phone fighting with James? It's none other than Natasha Lyonne giving voice to Otis' (and thus Shia's) mother.