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

1.
quand on parle du loup
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!
Nous parlions justement de Tom, et quand on parle du loup, le voici !
•
Oh, speak of the devil, there's Sarah walking towards us.
Oh, quand on parle du loup, voilà Sarah qui marche vers nous.