Taylor Swift was a guest at a Paramore wedding this weekend -- and snapped this shot with the band's singer Hayley Williams.

Taylor Swift & Hayley Williams
The duo attended the nuptials for guitarist Josh Farro -- who Williams dated for three years before he eventually ended up with now-wife Jenna Rice.

After the "I Dos", Hayley tweeted "Such a good day. Congrats again to Josh and Jenna Farro!"