One of the highest anticipated songs off of Taylor Swift's 'Red' is her duet with Ed Sheeran -- and luckily for fans of both artists (but perhaps not for their labels), the track leaked!

The song, 'Everything Has Changed,' sounds exactly the way you'd expect a Taylor Swift and Ed Sheeran collaboration would: soft, romantic, acoustic. "Ready to go?" Sheeran says at the start of the song. It's like a combination of a studio session, because it's polished and perfect, but still sounds like an organic jam session between the two mellow singers.

Swift and Sheeran harmonize in the romantic, crushworthy chorus that will melt even the iciest hearts. Similar to 'State of Grace,' the song focuses on meeting someone special for the first time and being unable to get them out of your head because you're so smitten -- and they feel the same. “I just wanna know you better, know you better now / I just want to know you / All I know is we said hello / And your eyes looked like coming home / All I know is you said my name / And everything has changed / All I know is you held the door / You’ll be mine and I’ll be yours / All I know since yesterday is / Everything has changed.

Rumor has it the rest of 'Red' has leaked in its entirety, though it's not due to debut until Oct. 22. Sounds like someone just couldn't wait an extra five days -- and if the rest of the songs are as sweet as this one, we don't necessarily blame them.

Watch Taylor Swift and Ed Sheeran Sing 'Lego House'