speak of the devil

US /spiːk əv ðə ˈdɛvəl/
UK /spiːk əv ðə ˈdɛvəl/
"speak of the devil" picture
1.

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!
Oh, speak of the devil, there's Sarah walking towards us.