I am beyond excited about this news from The Guardian UK:
Ethan Hawke and Julie Delpy wake up to possibility of Before Sunrise sequel
Actors in talks with film-maker Richard Linklater to make follow-up to Before Sunrise and Before Sunset films
"Baby, you're gonna miss that plane …" The ending of Before Sunset, Richard Linklater's second instalment in the romance of Jesse (Ethan Hawke) and Celine (Julie Delpy) looked to conclude things sweetly: with Jesse failing to return to the US, and the couple reuniting properly after their nine-year separation.
But in an interview with French website Allocine, Hawke reveals that he, Delpy and Linklater are negotiating a third outing for the transatlantic couple. "All three of us have been having similar feelings that we're ready to revisit those characters," said Hawke. "There's nine years between the first two movies and, if we made the film next summer, it would be nine years again, so we really started thinking that would be a good thing to do. We're going to try to write it this year." source
Do it, do it, do it! Best. Movies. Ever.