Sarah Snook, who plays Siobhan Roy in the series, revealed on her Instagram page last night that she recently became a mother. Snook revealed her pregnancy in the show's fourth season premiere last March.

She is married to Australian comedian Dave Lawson and this is their first child together, while Lawson has another child from his previous marriage. The actress posted a sweet photo showing the newborn's head peeking over her shoulder as they watched the series finale together. The finale of HBO's masterpiece drama "Descendants," which aired Monday, was a very emotional event.