Passage: Sami Gayle (born January 22, 1996) is an American actress. She co-stars as Nicky Reagan-Boyle in the CBS series Blue Bloods.\n\nQuestion: Based on this passage, who plays nikki in the pilot of blue bloods?
Steam of consciousness below:

User
To answer the above question, the relevant sentence is: She co-stars as Nicky Reagan-Boyle in the CBS series Blue Bloods.
So, the answer is Sami Gayle.
Assistant