iPhone only rings for certain people

any way to get my iphone to only respond to certain people? i would like only one or 2 people to be able to make a sound on my phone at night, so when they call, it wakes me, and other sounds, general email and text, not to make a sound at night.

i can obviously put it on silent but then those one or 2 people where the sound is important, wont make a sound on my phone so wont wake me...