Michelle Trachtenberg has lavished praise on her former Buffy The Vampire Slayer co-star Sarah Michelle Gellar - insisting the pregnant actress will make an "extraordinary mom".
Gellar, 31, is expecting her first child with husband Freddie Prinze Jr. and is due to give birth in the autumn.
Trachtenberg, who played Gellar's younger sister on the hit U.S. show, is a close friend of the couple and was delighted when she heard the news.
She tells People.com ,"I was jumping for joy. We talk every other day. I'm super excited! I'm so very happy for her and Freddie. She's going to be an extraordinary mom. Good people make great parents."
And Trachtenberg is convinced her friends' marriage will last - because they never discuss their private life.
She adds, "It's in the Ben Affleck, Jennifer Garner or Gwyneth Paltrow, Chris Martin vein - they really don't talk about their relationship. They keep their private, personal love life to themselves. That's what makes it so special."