With the second season having already wrapped filming in August , fans have been aware of a few key additions to the cast. There's Meryl Streep as Kidman's character's mother-in-law, and then Kidman's (spoiler) deceased husband Alexander Skarsgård, who is also rumoured to return. But the real scoop is that season 2 will feature Kidman’s real-life children. The Big Little Lies actress and producer appeared on Ellen DeGeneres’s talk show Tuesday and accidentally revealed the surprising addition.