"That Rose Leslie autograph is authentic. I have been studying GOT auto's since Season 2. There have been forgeries of her signature out there but the forgers cannot match her speed and flow. Nice autograph!"
"She doesn't have much of an autograph, but that is how she signed at her one UK show as well as SDCC 2012, 2013, and 2014.
I am certainly not saying that this couldn't be scribbled off by some forger, but I think you are safe.
"I don't know anything about emilia so i wont wager in, the will smith one looks pretty good to me, seen quite a few which are very similar, looks like a rushed street one, slightly sloppier at the end, but still good :) "