The pair have been spotted out together numerous times over that past month. St. Vincent, whose real name is Annie Clarke, lugged two big bags of Blue Wilderness dog food while Stewart followed with a big bag over her shoulder.
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They both wore casual clothing with the Twilight star rocking black tapered sweatpants with a white T-shirt and a loose cropped sweater.
St. Vincent wore Adidas sweatpants, a gray sweater, a red beanie and topped off the look with silver-framed glasses.
In July, the Personal Shopper actress spoke to Elle UK about her on-again, off-again relationship with Cargile.
“Right now I’m just really in love with my girlfriend,” she said. “We’ve broken up a couple of times and gotten back together, and this time I was like, ‘Finally, I can feel again.'”