So guess who wears knits in this movie. It's not really a question, not even a rhetorical one. The answer is: not royalty (one notable exception; you'll see). And so I present to you: the Logue Family...
Myrtle Logue's Cardigan
|Skeptical Myrtle questions your motives.|
Valentine Logue's Scarf
NOTE: he is wearing his dad's sweater here (see below) -- high fives to the costume designer for these details.
Lionel Logue's Cardigan
Lionel Logue's Vest
Anthony Logue's Fair Isle Vest
|He is his mother's son.|
...and then: there's Guy Pearce.
King Edward VIII's Diamond Vest
* (p.p.s. Derek Jacobi as Archbishop Cosmo! You can't make these names up.)