speak of the devil
US /spiːk əv ðə ˈdɛvəl/
UK /spiːk əv ðə ˈdɛvəl/

1.
噂をすれば影
said when a person you have just been talking about unexpectedly appears
:
•
We were just talking about Tom, and speak of the devil, here he comes!
トムの話をしていたら、噂をすれば影、彼が来た!
•
Oh, speak of the devil, there's Sarah walking towards us.
ああ、噂をすれば影、サラがこっちに歩いてくるよ。