The series finale ofOnce Upon a Timeis upon us.

After seven seasons and 155 episodes,Oncewill come to an end Friday night.

As such, theOUATbosses penned a letter to the fans, which EW can exclusively share.

ouat-letter

Troy Harvey/ABC via Getty Images; Courtesy of ABC

(hit the photo to enlarge.)

Read the letter, and then scroll down for our series finale preview interview with Horowitz and Kitsis.

Its up to the public and you guys to decide what the legacy is or isnt.

But with the hope that were also moving forward.

This show has always been about going past the happy ending.

It started with Snow White and Prince Charmings iconic happy ending and moved past it.

So were hoping that this ending of the show is in the spirit of that.

And I think all of our characters, in some ways, have found different struggles in that regard.

I think our ending endeavors to honor that for everyone.

I think Rumple really reflects that.

How would you describe the finale?

We look at both the last two hours as our last chance of doingOnce Upon a Time.

I think that people really just loved the characters the actors who played them.

Every week, we just transported people and gave them a little magic and hope in their lives.

We tried to do an original take on fairy tales.

I think we came out in a way that was different and people didnt expect it.

Its that alchemy of characters and fans that can make a show go on as long as we did.

Its like, whats your favorite child?

So that always gets me, to this day.

If in the future something else happens with the show, well be excited to see what that is.

Once Upon a Times series finale will air Friday at 8 p.m.