Based on real-life and in-continuity factors, how likely are the old cast members to return in the new series?

David Boreanaz and Ed Westwick are among Michelle Trachtenberg's famous castmates who have spoken out following her tragic ...

It's Now a Fan Event (Exclusive) Alyson Hannigan's Daughter Keeva Looks Just Like Mom in Rare Snaps Alongside Jenn Tran and Sasha Farber: 'Favorite People' Alyson Hannigan Has a Clever Idea for a ...

Related: Alyson Hannigan Is Embracing the 'Roller Coaster' of Back-to-School Season: 'Here We Go Again' (Exclusive) Later that day, Hannigan and Keeva took their seats at the final show of Swift's ...

Check out the emotional tribute posts that Michelle Trachtenberg’s Buffy the Vampire Slayer co-stars shared after her passing.

Rosie O'Donnell, Ed Westwick, SAG-AFTRA and others react to the 39-year-old's passing The post Michelle Trachtenberg’s Former ...

The NYPD confirmed to PEOPLE that Trachtenberg was found "unconscious and unresponsive" in her Manhattan apartment on ...

Alyson Hannigan hopes to keep her daughters from watching American Pie 'until they’re in college' Alyson Hannigan reacts to Taylor Swift's American Pie shout-out in 'So High School': 'I was ...

Sarah Michelle Gellar and Alyson Hannigan chatted with ET on set of the 'Buffy the Vampire Slayer' episode, 'The Prom,’ in 1999. The 'How I Met Your Mother' star is proud of her success.