From the linked article:
"It’s the least glamorous role I have ever played - I usually get cast in blonde girl roles. This one, though, was heavily dramatic. They dyed my hair dark brown and I wasn’t permitted even a lick of Vaseline on my lips - no makeup, none. I had some lip salve on set, hidden in my costume, and would sneak on a little bit before each scene. The make-up artist caught me one day and went ballistic."
Such sacrifices…