The couple have been spotted out together numerous times over the past month, and they continued their string of date nights on Wednesday at the American Pastoral premiere afterparty in New York City.
After Stewart, 26, walked the red carpet at the premiere of the upcoming crime drama to support her Twilight costar Dakota Fanning, she arrived with her new musician girlfriend at John Meadow’s American Cut Midtown to continue celebrating with the cast.
The pair kept things effortlessly chic for the occasion, with Stewart donning a pair of distressed black jeans and a basic white tee layered with a black blazer. St. Vincent matched her look in a tight black skirt with a matching crop-top and a fur jacket.
Once inside the party, the couple were seen looking “smitten” as they sat together at a VIP table and sipped on cocktails, a source tells PEOPLE. They were later joined by Fanning.
On Sunday, the two were spotted walking hand-in-hand after grabbing dinner together in Manhattan’s East Village.
“They have spent almost every day together since Kristen brought St. Vincent to her premiere on Oct. 3,” a source previously told PEOPLE.