Fans of Gilmore Girls have long anticipated the mythical "final four words" that show creator Amy Sherman-Palladino has had planned since 2006.
The show returns to Netflix for the long-awaited eighth series later this week when the mystery will finally be solved.
However Alexis Bledel, who returns as Rory Gilmore, said the stars did not immediately know what they would be.
She said: "They weren't in the script, they were not on paper.
"We had to memorise them. Amy told us at different times what they were going to be and I think we were both surprised."
Lauren Graham, who resumes her role as Lorelai Gilmore, added: "People leak things today so you can't put stuff on paper. There was a dummy scene instead which lots of people thought was real and had to be told it wasn't a real scene and was to take the place of the final four words. It was a decoy and it worked."
She maintains that romantic resolution for both the mother and daughter is not necessarily the most important part of the conclusion, saying it is really their relationship that anchors it all.
She said: "I think it's both. I think it's natural for people to project their own lives. Everyone would like to have love and to me the reassuring part of the show is, no matter what else happens, we have each other in good times and bad.
"The way it's handled here is gratifying and will be fulfilling for fans and fans of love."
That does not mean it is definitely the end of the show and Lauren says the door is open for a return.
She said: "It is because it always is but the question is, we are still stuck in feeling so proud of what we have done and feeling like it answers all the questions.
"I treasure this show and this experience so much I would never want to do anything that makes you feel like we are just hanging around because you can't get rid of us.
"I think we would all have the same creative conversations and will see how fans enjoy it."
Gilmore Girls: A Year In The Life will stream on Netflix on November 25 and the first seven series are available now.