"Forever n then some," she captioned the lovebirds' photo gallery.
Get a recap of the glimpses they've given of their whirlwind relationship so far in the timeline below.
February 2020 - Ari and Dalton were seen kissing at a bar
After her brother Frankie Grande clarified that Ariana is not dating Social House's Mikey Foster, TMZ shared a video of the pop star making out with a "mystery man" (who turned out to be Gomez) at Bar Louie in Northridge, California.
May 2020 - "Stuck with U" music video
When Ari teamed up with Justin Bieber for their quarantine love song, they shared a heartwarming video featuring celebrities and fans enjoying time with their loved ones in lockdown.
Around the three-and-a-half minute mark, Gomez (with his face cropped out) is seen swaying back and forth before Grande comes running in for a hug and kiss.
June 2020 - Instagram official?
When sharing that she's "almost 27" on Instagram, the "Positions" singer slyly added a cuddly, smiley selfie with Gomez amid a series of snaps. Though she didn't tag him in the photo, it was the first time fans got a proper glimpse at Grande's new love.
August 2020 - Birthday message for Gomez
Grande celebrated her boyfriend's birthday on Aug. 7 with a series of adorable videos and photos of the duo. "hbd to my baby my best friend my fav part of all the days 🙂 i love u," she captioned the post.
December 2020 - "life stuff"
The pop singer hopped on the Instagram photo dump train following the release of her Positions album, giving fans a glimpse into what she's been up to lately. The photos included a moon, a look into her twinkling Christmas decorations, a snap of Toulouse, a hilarious video of Grande's Nonna and, of course a photo of Grande and Gomez sharing a kiss.
December 2020 - She said yes!
Grande surprised fans with some much-needed good news on Dec. 20 when she shared photos of her sparkling engagement ring. "forever n then some," she said of her new fiancé.