Season-zero is reporting that the CW is developing a Charmed prequel by the team of the TV Show "Jane The Virgin" .
"Jane The Virgin" creator Jennie Snyder Urman and producer Brad Silverman are behind the project. The pilot is written by Amy Rardin & Jessica O’Toole (The Carrie Diaries) and directed by Brad Silberling (Jane The Virgin, A Series of Unfortunate Events movie) and will "follow three witches who fight evil in a small New England town during the seventies/eighties (1976)."
Another attempt at a Charmed spin-off happened 3 years ago when a reboot was in the works but it was then cancelled. Will the prequel be picked up? We will have to wait and see.
Source: Season-zero.com
EDIT: TVLine has unofficial descriptions for the 3 witches:
"a Charmed reboot is once again in the TV cauldron, with The CW ordering a one-hour pilot script that is being billed as a prequel-ish reimagining of the beloved WB original."
"Featuring an all-new cast, the potential series revolves around three witches who are brought together to fight evil in a small New England town circa 1976."
- Tina: African American. Whip-smart, Tina is one dissertation (and one dissertation advisor) away from a PhD. She can be reserved, even standoffish, in uncomfortable situations, but she picks up on everything and she’s definitely making quick, accurate judgments about you.
- Paige: Caucasian Cheerful, curvy, wholesome and as all-American as the apple pie she can’t wait to serve to the husband she has yet to marry. Paige’s main goal in life is to marry a rich doctor and be a wife and mother.
- Annie: Caucasian. Intense, smart, and quick to anger. She dresses neutrally, though she could give two s–ts if you like her outfit, so stop wondering what “neutral” means. But under that tough façade, well… there is a fragility. A person desperate to be loved, and love.
Source: TVLine
