McNamara took to twitter to celebrate the good news, writing "The future is female" and tagging her co-stars Katie Cassidy and Juliana Harkavy.
The spinoff will be spearheaded by a backdoor pilot in Arrow's upcoming eighth and final season, and will follow McNamara's Mia as she takes on the mantle of the Green Arrow with the help of the Canaries (Cassidy and Harkavy). The backdoor pilot will be written by Beth Schwartz, Marc Guggenheim, Jill Blankenship and Oscar Balderrama.
This news comes not long after CW President Mark Pedowitz revealed the network was looking to adapt a new DC property for 2020/2021. This would be the seventh Arrowverse TV series following Arrow, The Flash, Supergirl, Legends of Tomorrow, Black Lightning and Batwoman. While Black Lighting has remained separate from the Arrowverse so far, Cress Williams' titular hero will be making an appearance in the upcoming "Crisis on Infinite Earths" crossover, finally bringing him into the fold.
Returning Tuesday, Oct. 15 at 9 p.m. ET/PT on The CW, Arrow stars Stephen Amell as Oliver Queen, David Ramsey as John Diggle, Rick Gonzalez as Wild Dog, Juliana Harkavy as Black Canary, Katie Cassidy as Black Siren, Katherine McNamara as Mia Smoak, Joseph David-Jones as Connor Hawke and Ben Lewis as William Clayton-Queen.