Blake Lively and Ryan Reynolds expecting their third child

Blake Lively and Ryan Reynolds' family is growing!

The 31-year-old Lively confirmed that she expecting her third child with her husband and Deadpool star, 42. She made the surprise baby bump reveal while walking the yellow carpet at the premiere of Reynolds' new family film, Pokémon: Detective Pikachu, in New York City today.

The A Simple Favor star opted for a sparkly, figure-hugging yellow dress, which highlighted her new addition perfectly, and wore her hair in beautiful, full curls.

The Hollywood stars wed in 2012 and are already parents to four-year-old daughter James and two-year-old Inez.

Reynolds previously told Details in August 2013 that he'd hope to have a large family with Lively.

"We'd love to have a big family," he said at the time. "We both come from big families -- my parents did four, Blake's did five. A lot of people say it's crazy, but we'll only know when we're there, you know? We'll walk through that fire pretty happily, I think."

Congrats to the happy family!