Not always the fastest transformations, but some of them definitely grew in a relatively short time frame: https://www.girlswithmuscle.com/forum/thread/...
feel like blakelee ortega is going to make an appearance on this list. hot thread potential
Texas weather presenter, Jillian Fertig.
Before
https://youtube.com/watch?v=Pt6NiprJUU4&t=9s
After
i can't get enough of her. so incredible
Love me a good transformation. Would love some compares of the fastest transformations, eg, a girl going from nothing to muscles in a short amount of time, switching from physique to bodybuilding in a year, etc.