PREVIEW

It was confirmed earlier this week that the hit show is due to have a reboot, 20 years after it aired its final episode. Now the show's star, Sarah Michelle Gellar, has taken to social media to explain how she's involved in the new series. "So..... you might have heard some news this week, but I realize you haven't heard from me," the 47-year-old wrote on Instagram. "Three years ago, I got a call from my dear friend and mentor, Gail Berman...