This is extra apt, because I believe Andrea is playing a literal Victorian ghost (of Christmas Past) in Ebenezer, the new Johnny Depp movie where he plays Scrooge, Ron Weasley is Bob Cratchit, and Tramell Tillman is a presumably low-key sexy Ghost of Christmas Present. Look, as theme-dressing goes, this is bang on and I hope she keeps it up. "Victorian Ghost" is a rich font from which to drink, sartorially speaking and certainly, 'tis the season. I hope she also murmured "oooOOOOoooohh" as she wafted through the after-party.
Also, far be it from me to deny you further procrastination material. If you'd like to eyeball the Andrea Riseborough Red Carpet retrospective, it made it through the site migration unharmed! And it's fascinating: She's looked like so many different people!