Thursday was the 40th anniversary of the premiere of Star Wars, and for the occasion, sequel star Oscar Isaac stopped by The Late Show with Stephen Colbert and shared a little anecdote about working with the late, great Carrie Fisher.

First he talked about seeing Return of the Jedi—the first movie he ever saw in theaters—at maybe four years old, which really puts into context the honor he is about to relate. Flash forward several decades to his becoming a cast member for the sequels. He and Fisher did a scene on the first day of shooting for The Last Jedi when, as Isaac explains, everybody’s still finding the tone and consequently there’s often a number of retakes. And so: “It was a scene where I come up to talk to her and she’s very upset with me and slaps me,” and the director “kept doing it over, and over.”

“I think it ended up being like 27 takes of Carrie just leaning in—and every time she’d hit like a different spot on my face.” It is surprisingly touching and a tribute that Fisher would probably appreciate.