hear sth through the grapevine 从小道消息获知某事

Hello, 各位亲爱的朋友大家好，今天和大家分享的是：

hear sth through the grapevine 从小道消息获知某事

A: How did you know I was getting married?

B: I heard it through the grapevine. It doesn't matter. I'm happy for you.

(A: 你那时怎么知道我快结婚了？)

(B: 我从小道消息获知。那不重要，我真为你高兴。