Kanye's soft side is coming out ...

The unruly star showed off his more gentile nature when he posted an old photo of himself and his late mother, Donda West, on what would have been her 67th birthday.

The rapper, whose mother died in 2007 after a botched plastic surgery procedure, took the opportunity to tweet about his daughter North's desire to meet the grandma she never knew.

The 39-year-old superstar tweeted, "Nori asked if the airplane could take her to heaven to see you for your birthday. I love you mom."

We have to say we prefer these sweet tweets to the onslaught of Internet insanity that Kanye usually spews out on Twitter -- but clearly today instead of feeling angry at the masses, he's feeling the loss of his beloved mother.

The "Life of Pablo" rapper has previously spoken of the guilt he has over the death of his mother, who was an English professor.

He told Us Weekly, "My mom. If I had never moved to L.A. she'd be alive. I don't want to go far into it because it will bring me to tears."