On Tuesday, the “Into You” singer posted a picture on Instagram, confirming her relationship with the rapper.
Grande posted a picture of the two lovebirds hugging on the floor with the caption “baabyyy,” while tagging Miller in the picture.
The two have been rumored to be together for weeks after they were spotted getting close at a sushi place in L.A.
Grande, 23, and Miller, 24, were also spotted walking together on a New York City sidewalk ahead of the MTV VMA’s last weekend.
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They were later seen cozying up at the MTV VMA’s After Party.
The “Dangerous Woman” singer broke things off with Ricky Alvarez last month after one year together, PEOPLE confirmed.
Grande has been previously linked to rapper Big Sean and appeared with Miller in the music video to her single “The Way” in 2013.
Miller’s new album, The Divine Feminine, comes out Sept. 16.