Actress Blake Lively surprised fans at the New York City premiere of "Pokémon Detective Pikachu" on Thursday night, debuting her baby bump in a metallic yellow Retrofête dress, People reported.

>> Read more trending news

While the former "Gossip Girl" star and actor Ryan Reynolds did not make an official statement about expecting their third child, they eagerly posed for the cameras, E!Online reported. Reynolds is starring in the upcoming Pikachu movie.

Lively, 31, and Reynolds were married in 2012. They already have two children, 4-year-old James Reynolds and 2-year-old Inez Reynolds, People reported.

A representative for Lively did not immediately respond to People's request for comment.