updated 10/25/2010 AT 2:00 PM ET
•originally published 10/25/2010 AT 2:30 PM ET
First, the two attended the broadcast of Saturday Night Live in Manhattan, which was hosted by Swift’s good friend, Emma Stone.
“They showed up together,” a source tells PEOPLE. “They walked around together backstage, but they were careful not to be seen too close. It was hard to tell if they were together, but everyone was shocked that she brought him.”