The duo made their red carpet debut as a couple at the 2017 Met Gala and the 27-year-old "Starboy" singer shared a photo taken at the event on Instagram.
Gomez's mother commented on the picture: "Glowing, smiling, looking health and equal love. Mama is happy XO."
Mandy's message, however, attracted trolls.
She later posted a lengthy message for haters on Instagram.
"@selenagomez @theweeknd enjoy the ball...Yes, I am happy my daughter is happy. Turning off comments because they are vile and I was so unaware how many people know these people personally. My page is not for hate, name calling and uneducated opinions. XO," she wrote in the caption.
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