According to Us Weekly, the pair shared the news of their engagement openly at Robert Pattinson's birthday party in Los Angeles on Saturday (June 9).
"They are a perfect fit. They are not rushing to get married," an insider told the gossip magazine. "Their friends are really excited and supportive."
Grande seemingly confirmed the rumours by liking and replying to tweets of congratulations from a few of her fans.
HAHAHAHAHAHH HES BEEN BRIEFED
— Ariana Grande (@ArianaGrande) June 12, 2018
sksjsjjsjsjsja stfu
— Ariana Grande (@ArianaGrande) June 12, 2018
She even issued a message to her previously declared wife Camila Cabello.
we need to talk @camila_cabello
— Ariana Grande (@ArianaGrande) June 12, 2018
Grande and Davidson went public with their relationship less than a month ago, and have been flirting in the comments and showing plenty of PDA on Instragram since.
The "No Tears Left to Cry" singer confirmed her breakup with Mac Miller a month ago, giving a bit more insight into the relationship when she clapped back a guy on Twitter who criticized their split. She described her relationship with Miller as "toxic" and reminded the dude that she is "not a babysitter or a mother and no woman should feel that they need to be."
Saturday Night Live star Davidson, meanwhile, recently split with his long-term girlfriend (and daughter of Larry David) Cazzie David. He confirmed the split in an interview with Peter Rosenberg on his Open Late show.
Since going public with Grande, he's even got a pair of new tattoos — one featuring the bunny ears from Grande's Dangerous Woman era on his neck, as well as the initials "A.G." on his hand.
Whether with support, disbelief or straight up disapproval, Twitter is certainly buzzing over the couple's news. See some of the best reactions to the engagement below.
whoever is controlling the ariana grande and pete davidson sims just queued up get to know, chat, get to know, flirt, hug, ask if single, give rose, first kiss, get to know, tell joke, make out, get to know, ask to move in, kiss, woo hoo, propose, and put the game on fast forward
— 🔆 (@softwarmground) June 11, 2018
I've had water bottles in my room longer than Ariana Grande and Pete Davidson's relationship
— Katherine Fried (@katttfried) June 11, 2018
*ariana grande and pete davidson's wedding*
— Some Dude (@anxiousblackman) June 11, 2018
priest: if any person here can show cause why these two people should not be joined in holy matrimony, speak now or forever hold your peace.
mac miller: pic.twitter.com/jOrFxCF3bi
The head of IHOb watching people tweet about Ariana Grande and Pete Davidson when it was supposed to be their day. pic.twitter.com/2tZSgsSoVk
— Ryan Schocket (@RyanSchocket) June 11, 2018
everyone sitting around waiting for ariana grande and pete davidson to drop a message from their iphone notes application explaining why they called off their marriage and broke up one week from now pic.twitter.com/lStbNXiDdI
— Deveny (@deveny_walls) June 11, 2018
Colin Jost is dating Scarlett Johansson and Pete Davidson is dating Ariana Grande and every female comedian is like, "I wonder if I can get this pile of sweatshirts to commit to me."
— Julia Claire (@ohJuliatweets) June 9, 2018
So Ariana Grande is already engaged to Pete Davidson... Mac Miller's next album is gonna change heartbreak forever
— Bradley (@bradsaunders_10) June 11, 2018
the media: "ariana grande rumoured to be causally dating pete davidson"
— alex (@buterasquits) June 11, 2018
ariana and pete: haha u thought shishtar
i imagine pete davidson and ariana grande's whirlwind romance is reenacting the we found love in a hopeless place music video every single day
— Sarah Hagi (@geekylonglegs) June 11, 2018
Pete Davidson: will you marry m-
— queen quen (@quenblackwell) June 11, 2018
Ariana Grande: pic.twitter.com/04uhqD4Uaj
#ArianaGrande and #PeteDavidson are engaged. This is me, watching their relationship go from 100-0 real quick. pic.twitter.com/BdhGNNCtyp
— HollywoodTattleTale (@HWoodTattleTale) June 11, 2018
I have a pending iPhone update older than Ariana Grande and Pete Davidson's relationship.
— Foba Bett (@patbaloy) June 11, 2018
frankly i would propose to ariana grande the literal second i met her, so i think its admirable that pete davidson held out as long as he did
— moon 🌙 (@_marienadine) June 11, 2018
news articles: pete davidson and ariana grande are engaged.
— ㅤㅤْ (@tearfeltari) June 11, 2018
us: pic.twitter.com/Izea5JOYhT
i love album promo season https://t.co/GT6tf5aQa1
— #BrittanySpanos (@ohheybrittany) June 11, 2018
Ariana Grande and Pete Davidson are moving at the speed of light in their relationship. At this rate they'd have adopted a kid and gotten divorced by the end of July. #ArianaGrande pic.twitter.com/synKP0VrXQ
— Noma Mabandla (@Norma_ott) June 11, 2018
Petition to have MTV bring back Newlyweds but it's Pete Davidson and Ariana Grande instead of Jessica Simpson and Nick Lachey
— Jess G👀dwin (@thejessgoodwin) June 11, 2018
Me logging into twitter after 5 min and seeing the whole ariana and pete engagement pic.twitter.com/8wVapBzjxf
— Mick | was @arianatorarmey (@moonlightsfocus) June 11, 2018