Know Your Ally: Britain was a 45-minute propaganda film made in 1944. It was narrated by Walter Huston and produced by the United States War Department and Signal Corp to solidify Anglo-American solidarity within the ranks as well as counter Nazi propaganda aimed at weakening the Alliance.
| Actor | Role |
|---|---|
 Walter HustonNarrator | Narrator |
 Ernest BevinSelf (archive footage) | Self (archive footage) |
 Winston ChurchillSelf (archive footage) | Self (archive footage) |
 Adolf HitlerSelf (archive footage) | Self (archive footage) |
| HHerbert MorrisonSelf (archive footage) | Self (archive footage) |
 Louis MountbattenSelf (archive footage) | Self (archive footage) |
 Benito MussoliniSelf (archive footage) | Self (archive footage) |
 Franklin D. RooseveltSelf (archive footage) | Self (archive footage) |
 Orson WellesNarrator/Bob (helpful taxi passenger) | Narrator/Bob (helpful taxi passenger) |