Our friends at Fandango interviewed Lupita Nyong’o at D23. Lupita is asked about her role in Star Wars: The Force Awakens and if it is difficult to keep this stuff secretive. The actor who is playing Maz Kanata has this to say about her character:
Well, the easy part is you don’t get to see me until you see the film.
With that in mind, it seems she believes her appearance will officially be kept a secret for general audiences until the film is released in December. See the full video below: