The actress is dating Harley Gusman, who’s vice president and head of marketing at skincare company Truly Organic, a source tells PEOPLE exclusively.
On Saturday, the new couple was spotted on a dinner date at Hollywood hotspot Katsuya. The duo pulled up in a Lyft car, and Rose was dressed in all-black while her new girlfriend wore a crop top and wide-legged pants.
“LA, you’ve been good to me,” Gusman captioned a photo of herself with Rose over the weekend.
The Orange Is the New Black actress also shared a fun snap on her own Instagram account, captioning it “Pretending to be badass.”
An onlooker at Katsuya tells PEOPLE that Rose, 30, “was sitting across from her girlfriend. It was definitely a date night.”
The source tells PEOPLE that, though Gusman was having hot sake, “Ruby was not drinking. They shared spicy tuna crispy rice, yellowtail jalapeno, edamame, shishito peppers and lobster dynamite.”