CBS All Access' still-untitled Jean-Luc Picard-centric "Star Trek" spin-off series has added three actors in regular roles, via Deadline.

"Scott Pilgrim Vs. The World" actor Alison Pill, "Penny Dreadful's" Harry Treadaway, and "American Crime Story's" Isa Briones have all been cast in undisclosed roles.

Previously announced cast members for the series include Santiago Cabrera, Michelle Hurd and Evan Evagora, and of course Picard himself, Patrick Stewart.

Harry Treadaway. (Image credit: Featureflash Photo Agency/Shutterstock)