Which actress, Lady Loisette?
Yvonne Strahovski. She was in Chuck, then she guest starred in the last two seasons of Dexter and she was just in the 24: Live Another Day miniseries. Her casting in The Astronaut Wives Club was just announced on Tuesday. She's also done a few movies in between in her TV projects, both in the US and her home country of Australia.
I've been doing work for one of her fansites since 2011 and my responsibilities there keep growing.
