On Friday, viewers watched as Katy and her son Joseph left Weatherfield in the back of a taxi as they made their way to the airport to make a new life in Portugal.
Now speaking in a new video shared on Corrie's official website, Georgia said: "It's been amazing playing Katy Armstrong, I've had the best nearly five years on Coronation Street. I'm going to miss her. You're really going to get me all emotional now!
"She was feisty, she was good fun, she was also a bit miserable at times, but she's had a real journey and that's what's been quite good to play.
"She's grown up on the street and I've enjoyed doing that. I've been proud to be an Armstrong. I've had the best time being in that family."
Georgia joined Corrie in 2010, and she says her favourite storyline was Katy's affair with Ryan Connor.
"My favourite Katy storyline was probably the affair she had with Ryan," she explained. "It was something really different for Katy. We saw her grow up a little bit and turn into a bit of a minx.
"Also, the birth storyline was really good fun to do," she added. "it was a bit strange, but really good fun. I never thought I'd be able to do a birth scene."
Katys final episodes ever tonight! And the end of an amazing era of my life... Hope you all enjoy them! @itvcorrie— Georgia May Foote (@georgiafoote) March 20, 2015
Katy said reading her final scenes became quite emotional.
"I actually cried my eyes out reading the whole story," she confessed. "It's not that it's a sad couple of episodes, it's just a massive end of a journey for me, as well as Katy.
" I was quite pleased with them. Back of a taxi, leaving Coronation Street – it's gotta be done in the usual way, hasn't it? I don't think I could have enjoyed my time here so much if it wasn't for all you lot out there, so thank you very, very much!"
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