+1 for Kiri. Watching the movie, I had no idea who was playing her. Didn't recognize the face or the voice, though I could tell her character was related to Grace Augustine. When the credits started rolling, I expected to see the name of some young actress I didn't recognize. ...Nope! It was Sigourney Weaver all along! I knew she would be in this movie, but I didn't even recognize her beyond those couple moments as Grace. Boy, was I surprised. She gave an amazing performance. Judging from the video below, it looks like the other cast and crew were wowed by her too: