ну надо же

well, would you look at that!

→ ну
phrase Rare #46,716
well, would you look at that! An exclamation expressing surprise, sometimes with irony. Literally, the words mean something like “well, it’s necessary,” but the exclamatory use is idiomatic.
RU: Ну надо же, ты уже здесь!
EN: Well, would you look at that, you’re already here!

Ну надо же!

Well, well!

— Зов волка (2019)

Ну надо же кому-то.

Well, somebody has to.

— Жизнь не может быть скучной! (2011)

Ну надо же, кавалерия.

Well, well, cavalry.

— Приключения Паддингтона 2 (2017)