The smiling 36-year-old actress and Nick, 23, were seen at a Starbucks in the Mammoth Mountain Ski Area with a small group of friends, reported New York Daily News.
The celebrity duo, who reportedly met through Kate's brother and Nick's "Scream Queens" co-star Oliver Hudson, has fuelled and dodged romantic rumors for months.
The "Jealous" singer claimed he was single and "alone" during an October interview with Ellen DeGeneres. In a separate appearance that same week, the "Almost Famous" star hedged around questions about Jonas.
The two were also photographed in October after partying at the upscale Meatpacking District club Up & Down.