The 18-year-old actress is at the event as a nominee with the cast of Captain Fantastic. They are up for Outstanding Performance by a Cast in a Motion Picture.
If you have seen the movie, you will understand why it is totally appropriate for the cast to be flipping off the photographers together!
FYI: Annalise is wearing a Bibhu Mohapatra dress and Amrapali earrings. Samantha is wearing a Philosophy di Lorenzo Serafini dress, Loeffler Randall shoes, an Edie Parker bag, and Yossi Harari jewels.