'Game of Thrones' Premiere Enlisted Jon Snow to Help Prevent Spoilers

Ygritte, aka actress Rose Leslie, ended Harington's announcement during the event with her famous line-turned-meme: "You know nothing, Jon Snow."
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Kit Harington and Rose Leslie at the 'Game of Thrones' L.A. premiere.

To help prevent spoilers from spilling after the July 12 premiere of Game of Thrones' seventh season at Walt Disney Concert Hall, HBO enlisted its own A-list talent. After intros by programming president Casey Bloys and creators David Benioff and D.B. Weiss, Kit Harington's voice boomed from the speakers.

"Lords, ladies, wildlings, bastards and CAA agents," he intoned as Jon Snow. "To join our order, you must swear our sacred oath. Night gathers, and now my Watch begins. I shall take no photos, hold no phones, spread no rumors on social media. I pledge my life and honor to tonight's Watch for this night and all the nights to come. Until Sunday [July 16, when the premiere aired]. The good people at HBO take this vow very seriously. I know you will as well."

If Snow weren't enough, then came the voice of his one-time sparring partner, Ygritte, dishing out her most memorable line, one that became a viral meme many times over. "You know nothing, Jon Snow," quipped Ygritte aka actress Rose Leslie. 

THR has learned that Benioff and Weiss — both repped by CAA hence the nod to the agency in the opening line — penned the voiceover script together with HBO insiders handling the logistics of locking in both Harington and Leslie.

Added bonus: Both actors were in attendance at the world premiere, despite the fact that Leslie's character was killed in season four, episode nine. She still managed an invite, arriving hand-in-hand with real-life beau Harington.

A version of this story first appeared in the July 19 issue of The Hollywood Reporter magazine. To receive the magazine, click here to subscribe.