Carey and Packer made their red carpet debut together at The Intern premiere in September, where an eyewitness told ET the couple looked “really cute together" and "seemed very happy."
"James was leading Mariah through the theatre room and had his hand on her back. Mariah looked very proud to be there with James," an eyewitness told ET at the time. "He seemed a little more under the radar than she is but looked at her very adoringly and happy."
The following month, Carey opened up to ET about the outing.
"I don't think either one of us thought, 'Here we are, making a debut,' he's not that guy," Carey said on the set of her Hallmark Channel holiday movie, A Christmas Melody. "It was a lot for him. ... I just automatically pose. I can't help it!"
It will be the third marriage for Packer, who has three children from his marriage to Australian model and singer Erica Baxter.
Carey was married to actor and comedian Nick Cannon from 2008-2014, with whom she shares 4-year-old fraternal twins, Monroe and Moroccan.