(Yes, theshow filmed in LA, despite being set in NYC.)
The pair publicly announced their engagement the next year, and then finally got married in November 2014.
Theyve been living happily ever after ever since.

David and I started dating, and we never stopped, Harris said.
I didnt come out till later.
I didnt really date a bunch of random people.

Read on for their full relationship timeline to see how they got to this point.
Burtka, in return, simply gave him a head nod and turned away.
I assumed he was Kates boyfriend and said, Nicely done, he wrote.

And she said, David?
Hes not playing on my team, but he has a boyfriend.
However, as Burtka said, he was struggling in his long-distance relationship at the time.
The first time they actually hung out was at anAmerican Idolviewing party thrown by Kate.
I just stammered around him.
I couldnt take my eyes off him, Harris wrote.
Theres something kinetic about him and his being.
Hes classically sexy, yet hes very much a boy in his energy.
From then, it was history.
We talk on the phone at least eight times a day and text at least 25 times a day.
I assumed the show would be a short chapter, Harris toldArchitectural Digestin 2015.
Clearly, that didnt happen.
The series ran for nine seasons before eventually concluding nearly a decade later in 2014.
I thought he wanted to get some booze or something.
When he got the ring a few weeks later, the message was clear.
However, they kept their engagement quiet for years to come.
(Gay marriage not being legalized in every state at the time also didnt help.)
And so they did.
Harris announced that they were expecting twins via surrogate in August 2010.
So, get this: David and I are expecting twins this fall,he wroteon Twitter.
On 10/12, Gideon Scott and Harper Grace entered the Burtka-Harris fold,he tweeted.
All of us are happy, healthy, tired, and a little pukey.
David and I did propose to each other, but over five years ago!he confirmedon Twitter.
Weve been wearing engagement rings for ages, waiting for an available date.
@nph I will love you over and over again year after year…
Thanks for working so hard and for putting up with me.
Heres to another 18!!
For his part, Harris shared an adorable photo of them hugging and gazing into each others eyes.
Our first date was 18 years ago today.
And David Burtka, I am not about to let you go,he wrote.
Thank you for showing me the capacity of my heart.