Katherine Heigl joins the cast of Netflix's Firefly Lane 10 months ago

Katherine Heigl joins the cast of Netflix's Firefly Lane

Katherine Heigl has joined the cast of Netflix's Firefly Lane. 

According to The Hollywood Reporterthe actress will play Tully Hart, who is described as being magnetic, ambitious and fiercely loyal.

Firefly Lane tells the story of Tully and Kate, who meet in secondary school and soon become inseparable, making a pact to be ‘best friends forever’.

Through thirty years, they support each other through the ups and downs of life, weathering the storms of friendship, jealousy, anger, hurt and resentment.

They think they’ve survived it all - that is, until a single act of betrayal tears them apart, and its unclear if they will be able to ever reconcile.

Maggie Friedman is adapting the novel for the 10-episode series, and will serve as show runner. She will also executive produce alongside Katherine Heigl, Stephanie Germain and Lee Rose.

It comes as Heigl recently spoke about the possibility of returning to Grey's Anatomy. 

The 40-year-old told Entertainment Tonight:

"I haven't (thought about Izzie) in years. I don't know. I don't know if I would or if I wouldn’t.

"I almost just feel like that would be distracting again to what they've done with that show in the ... years since I left, you know, and what that's become and what it is to the fans now.

"It would just be kind of like, 'Yeah we already let that go. Why are you here?'"