Since breaking up with Ricky Alvarez, the former Nickelodeon star has frequently been seen together with Miller, whom she first collaborated with on 2013 song "The Way", reported Aceshowbiz.
Earlier this week, Grande, 23, and Miller, 24, were photographed together at the West Virginia Airport before fans saw her during his performance at West Virginia University's FallFest on the next day.
The duo was also seen hanging out with two boys at a studio in his hometown of Pittsburgh.
Grande and Miller have been good friends since they collaborated on "The Way" and showed undeniable chemistry in the song's accompanying music video.
Grande recently reunited with Miller for the remix of her newest single "Into You" and she is reportedly going to make a guest appearance on his new album.
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