I refer, of course, to Allison Janney! There are some other people in the film as well.
It is an interesting idea, that the Kerrigan-Harding situation, and Tonya herself, were different from what we came to understand at the time. It will take a bit of a shove to get me to not think Harding was an utter asshole, but that is what the movie apparently purports.
Have a look at this discussion: Continue reading I didn’t think I cared about “I, Tonya” until I heard who was staring in it