• Jeff Goldblum as Dr. Ian Malcolm: A mathematician and chaos theorist.
• Julianne Moore as Dr. Sarah Harding: Ian's girlfriend and a behavioral paleontologist.
• Pete Postlethwaite as Roland Tembo: A big-game hunter who adheres to his own strict moral code.
• Arliss Howard as Peter Ludlow: Hammond's nephew who has been appointed CEO of InGen.
• Richard Attenborough as Dr. John Hammond: The former CEO of InGen who takes steps to redeem himself after the Isla Nublar incident by preserving Isla Sorna.
• Vince Vaughn as Nick Van Owen: An experienced documentarian, photojournalist and environmentalist.
• Vanessa Lee Chester as Kelly Curtis: Ian's daughter who stows away in the support trailer to be with him.
• Peter Stormare as Dieter Stark: The second-in-command of the InGen group under the control of Roland.
• Harvey Jason as Ajay Sidhu: Roland's friend and hunting partner.
• Richard Schiff as Eddie Carr: A field equipment expert.
• Thomas F. Duffy as Dr. Robert Burke: The InGen hunters' paleontologist.
• Joseph Mazzello as Tim Murphy: Hammond's grandson.
• Ariana Richards as Lex Murphy: Tim's older sister and Hammond's granddaughter.
• Camilla Belle as Cathy Bowman: The daughter of a wealthy family that stumbles upon Isla Sorna.

After the release of the novel Jurassic Park in 1990, author Michael Crichton was pressured by fans for a sequel. Having never written one, he initially refused. While shooting the novel's 1993 film adaptation, director Steven Spielberg believed that if a sequel film were made, it would involve the retrieval of a canister that contained dinosaur DNA lost during the events of the first film. Talk of a sequel began after the release of the first film, which was a financial success. Spielberg held discussions with David Koepp and Crichton, who both wrote the previous film, to talk about possible ideas for a sequel. The production schedule for a second Jurassic Park film was dependent on whether Crichton would write a sequel to the first novel.

In March 1994, Crichton said he had a story idea for another book, which would then be adapted into a film. At the time, Spielberg had not committed to directing the new novel's film adaptation, as he planned to take a year off from directing. In March 1995, Crichton was nearly finished writing the second novel, scheduled for release later that year. Spielberg had signed on to produce the film adaptation, with filming to begin in 1996 for release the following year. Spielberg was busy with his new DreamWorks studio and had not decided if he would direct the film, saying, "I'd love to direct it, but I just have to see. My life is changing".

A production team was assembled by mid-1995, as Crichton was finishing the second novel, titled The Lost World; simultaneously, Spielberg and Koepp were developing their own ideas for the screenplay. Crichton's novel was published that September, and Spielberg was announced as director two months later. Spielberg and Crichton agreed to forego upfront fees for a share of the back-end. Koepp's deal was said to be the most lucrative for an adaptation at the time, with a fee in the region of $1.5 to $2 million. Joe Johnston had offered to direct the film, and eventually helmed the 2001 sequel Jurassic Park III.

The storyboarding process had begun in June 1995. Like with previous Spielberg films, storyboards were heavily utilized early on to help develop sequences as well as the overall plot. As the year went on, Spielberg would continue to brainstorm ideas and would make rough sketches to help illustrate his vision. The Lost World: Jurassic Park had nearly 1,500 storyboards, which aided in the precise planning needed to shoot scenes involving action, dinosaurs, and special-effects. The pre-production process began in January 1996. Within three months, the scenes represented in storyboards were numerous enough to create a four-hour film, necessitating the need for cuts. The InGen village on Isla Sorna was among elements of the film that underwent many design changes early on.

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For the sequel, composer John Williams avoided using most of the previous film's main themes, writing a more action-oriented score. The soundtrack was released on May 20, 1997. It, along with the soundtrack to the first film, was remastered and re-released on November 29, 2016.