Ariana, who was dressed in head-to-toe black and carrying a purple unicorn onesie, shared a lengthy embrace and kiss with Miller before being whisked away in an SUV caravan to a family member's home in a nearby gated community.
Miller could also been seen warmly embracing Ariana's mother Joan, who like her daughter was dressed entirely in black, and giving her a kiss on the cheek as he helped her into one of the waiting vehicles.
Police cars were also seen surrounding Joan's nearby home, less than 24 hours after 22 people lost their lives and another 119 were injured when a improvised device went off inside Manchester Arena just moments after Ariana performed her final song.
Joan was one of the people in attendance when the bomb exploded on Monday and heading backstage to congratulate her daughter when the night suddenly described into chaos.
Rather than panic however, she immediately got to work helping some of the young concertgoers make their way out of the arena and safely backstage, where she stayed with the group and helped to calm them down amidst the mayhem.
Ariana has yet to speak publicly about the devastating attack, but did post a message on Twitter early Tuesday, writing: 'broken. from the bottom of my heart, i am so so sorry. i don't have words.'
The pop star has also now indefinitely delayed her much-anticipated European tour, which kicked off in Stockholm on May 8 and was set to wrap up on June 15 in Rome.
She and Joan made a quick and quiet departure from England early Tuesday morning with a little help from fellow pop star Taylor Swift, who lent the two women one of her private jets. Sources told TMZ, however, that Swift wasn't involved in the process, as the private jet was financed down the middle by Grande's touring corporation Live Nation and manager Scooter Braun.
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