Kanye West thinks Ariana Grande is good for Big Sean.

The 37-year-old star, who is married to reality TV beauty Kim Kardashian West, has reportedly given the couple his seal of approval after the 26-year-old rapper introduced the 'Love Me Harder' hitmaker to his mentor.

A source close to the 'New Slaves' hitmaker said: ''Kanye likes her for Sean. He says she's a cool girl.''

Meanwhile, Ariana, 21, and Sean's relationship is getting increasingly serious.

The insider told Us Weekly magazine: ''[He] has swept her off her feet. Sean's very sweet and treasures Ariana.''

The couple confirmed they are dating in October after months of trying to keep their relationship status a secret.

But Ariana recently gushed about their romance, saying: ''I like boys with a bad boy kind of style, but Sean's the best boy I've ever met. He's a sweetheart.

''I'm not that open... I'm still a little shy about it. But I am very happy and very loved-up.''

Earlier this year, Sean admitted he was full of admiration for the brunette beauty.

He said: ''That Ariana is very, very special. She's very special to me.

''Everything she has going on is good with her, everything I have going on is good with me, everything between me and her is good, and I'm just going to leave it at that.''