Two Taylor Swift superfans tied the knot at her concert on Friday (12.06.15).

Katy Harris and Chris Eisenman - who are self-confessed loyal supporters of the 'Shake It Off' hitmaker - attended the star's concert in Philadelphia, Pennsylvania and received the surprise of their lives from the star herself when she invited them backstage.

Gushing about the night she and Chris will never forget, Katy wrote on Instagram: ''Last night was a dream sequence. Instagram, meet my new husband Chris and our new friend Taylor!!!!!!

''I have no words to express lastnight!! My two dreams came true!!! @taylorswift #1989tourphilly #hitchedattswift #bestnightofmylife (sic)''

The pair - who were hoping to wed on the 25-year-old singer's birthday in December - said their vows outside the Lincoln Financial Field before attending the concert in their full wedding attire.

In another post before the big day, Katy wrote: ''Some of you may have seen on facebook that Chris and I plan to get married in 3 days at the #1989tourphilly Taylor Swift Concert #06122015 --- We originally planned a a whole wedding for 12-13-14 ( Taylor's 25th birthday! ) We had reasons why we had to put it off ...

''If you know anything about me its probably how I have been obsessed with Taylor since I first heard her in 2006. Chris has been very supportive and could even put most girls to shame going word for word on any of her albums (including deluxe editions) So naturally how could I ever give him up?! ... Please tag Taylor for us in the comments so maybe she will catch wind of it! #wearenuts #hatersgonnahate #1989 #swifties #tagtaylor (sic)''