How can I wean my 8 month old twins off the pacifier? They don't use it a lot in the day. Especially…

How can I wean my 8 month old twins off the pacifier? They don't use it a lot in the day. Especially my girl twin. But my boy twin loves it. He loves it so much he has to have it to sleep at night. But if it falls out of his mouth at night he wakes up crying. I wanna get them off it now before the get any older. My first son never really liked it or used it much so I never had to wean him off I just stopped.