The actor, who plays Chandrilan Senator Mon Mothma, breaks down the journey of the future Rebel Alliance leader and her big speech denouncing the Emperor in Episode 9.

Warning: SPOILERS for this week’s Andor episodes are ahead! “Who Are You?”, the second of the three Andor Season 2 episodes that premiered on the 2025 TV schedule, depicted the Ghorman Massacre, an event that had already been mentioned in Star Wars history.

"It was such a huge thing to me to give that whole speech," O'Reilly tells EW. "The monster who will come for us all soon enough is Emperor Palpatine." With those resounding words, Mon Mothma (Genevieve O'Reilly) gives up any pretension of allegiance to the Empire and declares herself a member of the Rebellion.