Which 2000's film was promoted with the line "Be warned. Be ready"?

The 2000s film promoted with the line “Be warned. Be ready” was Bewitched. Released in 2005, Bewitched was directed by Nora Ephron and drew its premise from the classic 1964–1972 television sitcom of the same name.

Nicole Kidman plays Isabel Bigelow, a real witch who wants to live without using magic. Will Ferrell plays Jack Wyatt, a fading actor cast as Darrin in a planned television remake of Bewitched. Jack recruits Isabel to play Samantha because he thinks her distinctive nose-twitch will make her perfect for the role, not realizing that she actually has supernatural powers.

The film is therefore not a straightforward remake of the original sitcom. It is a romantic fantasy comedy about making a remake, with the fictional production mirroring the famous television series. Shirley MacLaine plays the actress portraying Endora, while Michael Caine plays Isabel’s father.

A common mix-up is confusing this movie with the original Bewitched television series or assuming Nicole Kidman plays Samantha Stephens directly. Her character is Isabel, who is cast as Samantha within the film’s story.