What are the odds!
or
What a coincidence!
(walking down the street)
Hal: Is that you Jill?
Jill: What are the odds! I haven't seen you in years.
Hal: Yeah, I'm in town visiting my folks.
Jill: If you have time later, let's grab a drink and catch up.
Hal: That sounds nice, I'll give you a call. Is it still the same number?
Jill: Yeah, it is.
Hal: Cool, see you soon.
Meaning I am surprised to see you here, it is a nice surprise. Folks is a casual word meaning parents.
(in a supermarket)
Ben: Hey, Jerry! What a coincidence!
Jerry: Oh, hi Ben. How's it going?
Ben: Pretty good, and you?
Jerry: Not bad, I'm just grocery shopping with my wife.
You might also hear a bit of an older saying when you see someone somewhere you don't expect to see them. It sounds a bit more formal.
Fancy meeting you here!
(at a party)
Greg: Maria, fancy meeting you here! I didn't know you knew Dan.
Maria: Dan? Oh, I don't know him so well. I'm here with my friend Chris. He works with Dan I think.
Greg: Well, it's a nice coincidence running into you here. How have you been?
Maria: Not bad. These days I'm...
I just thought of a 4th related expression: "What a nice surprise!" you can use all 4 of these interchangeably. They have pretty much the same meaning. Any questions?
Have a nice week,
Phil
