Yes, "The Greatest Showman" is inspired by the true story of P.T. Barnum, a 19th-century showman and founder of the Barnum & Bailey Circus. The film portrays his rise to fame, his vision of celebrating uniqueness, and the creation of a spectacle that included various performers. While it takes creative liberties and embellishes certain aspects of Barnum's life and career, the central themes of acceptance and the pursuit of dreams reflect his legacy.

In "The Greatest Showman," Hugh Jackman performed his own singing for the majority of his role as P.T. Barnum. However, for some specific parts, his vocals were supplemented by singer and songwriter Keala Settle, who is known for her powerful voice and performed the song "This Is Me." Overall, Jackman was heavily involved in the musical aspects of the film, showcasing his talent as both an actor and a singer.

Hugh Jackman did sing in "The Greatest Showman." However, during the filming, he faced health issues, including a severe case of shingles, which affected his ability to perform. Despite this challenge, he managed to deliver memorable vocal performances for the film's soundtrack, showcasing his talent. Jackman has been known for his singing abilities, particularly in musical theater, and "The Greatest Showman" was an opportunity for him to showcase his skills in a cinematic setting.

"The Greatest Showman" is generally considered kid-friendly, making it suitable for family viewing. The film features uplifting themes of acceptance, diversity, and pursuing dreams, accompanied by catchy musical numbers. While it includes some mature themes, such as societal rejection and personal struggles, these are presented in a way that is accessible for younger audiences. The movie is rated PG, which indicates parental guidance is suggested, but most children are likely to enjoy its vibrant visuals and inspiring story.