"Well, you know, I mean, she was so wonderful, and she really played the role to perfection"

Julianne Moore is revealing her adoration for a person who played a role to perfection. She is implying that the individual was so terrific and gifted that they were able to bring the character to life in a way that was flawless. She is praising the individual for their ability and talent in having the ability to portray the character in a way that was credible and true to the story. It is clear that Julianne Moore has a great deal of regard for the person and their ability to bring the character to life in a manner that was so persuading. She is expressing her adoration for the individual's skill and skill in being able to bring the character to life in a way that was so perfect.