there are different methods, ultimately it depends on her.
You can push feeds back.
You can say not between certain hours.
You can leave your DH to settle her for a few nights and see how you go.
You can offer something else instead.

Good luck!

I night weaned DS at 14 months and we did the daddy substitute thing, plus pushing back feeds till none till morning. That worked ok, except that he still work up and asked for food instead.

I haevn't even contemplated it for DD as she is so attached to feeding during the night. Right now she's back to 90% breastmilk diet. sigh. maybe in 6 months or so.