Fastest most effective way to grow a butt?

Callina • Expecting Baby #1 September 2019💛

As you can see I am a thicker girl but I really want to grow an ass. I feel like it would make my body look more proportionate as my legs are on the more muscular side yet my butt is basically non existent. Is there any tips on making this happen? (Preferably something you can do without weights as I don't have any at the moment. ) Also a suggestion on how many reps/how often to do it that would be nice as well. :)