be in luck

To experience good fortune, typically when one's wishes are fulfilled unexpectedly. A: "Aw, man, I can't believe I forgot to bring my headphones with me to the gym." B: "Well, you're in luck—I have an extra pair you can borrow." You're in luck—this is the last one. You have the paperwork with you? Well, then, you're in luck because we can notarize it for you here in this office.

you’re in ˈluck

your ˈluck is in

you are lucky at the moment: I knew my luck was in today when all the traffic lights were green on my way to work. And now I’ve found that money I lost.