Ariana Grande and Pete Davidson. Picture: Instagram

Ariana Grande's engagement ring is "big."

The 24-year-old singer's new boyfriend Pete Davidson reportedly popped the question to her a few days following their whirlwind romance but, although their friends and family are slightly confused by how fast their relationship is heating up, the 'Saturday Night Live' star has pulled out all of the stops to prove his love for her.

A source told People.com: "All I know about the ring is that it's big." 

Ariana Grande is engaged - report

The couple are yet to confirm their engagement news, but the 'No Tears Left to Cry' hitmaker set tongues wagging on Monday night when she uploaded a cryptic message on social media and began liking fan posts about their relationship.

She wrote on her Twitter account: "wow i love u so f**kin much !"

Followed by the saucy message: "got a bed w your name on it."

Although the brunette beauty seems really loved up with Pete, 24, people are said to be concerned about the authenticity of their romance as she jumped into a relationship with him just days after announcing her split from Mac Miller.

A source said recently: "[Ariana was in a] bad past relationship, and now she is with someone who appreciates her and makes her laugh and just makes her feel good. In relationships, Pete is known to be the caring one and the full steam ahead guy. He is not shy about who he likes and, like with Ariana, is very public.

"The combination of a girl who is yearning to be loved and mixing it with a guy like Pete creates this intense relationship that is moving a million miles a minute. 

"For both of them, this relationship is heaven compared to their past relationships and they're just clinging to that heaven and thrilled about it."

Following her split from the rapper, Ariana claimed she spent the majority of their "toxic" two-year relationship feeling "scared."

She said: "How absurd that you minimize female self-respect and self-worth by saying someone should stay in a toxic relationship because he wrote an album about them, which btw [by the way] isn't the case (just Cinderella is ab [about] me). I am not a babysitter or a mother and no woman should feel that they need to be. 

"I have cared for him and tried to support his sobriety & prayed for his balance for years (and always will of course) but shaming/blaming women for a man's inability to keep his s**t together is a very major problem. Let's please stop doing that. of course I didn't share about how hard or scary it was while it was happening but it was. I will continue to pray from the bottom of my heart that he figures it all out and that any other woman in this position does as well."

Bang Showbiz