Ghosts of the Abyss (also known as Titanic 3D: Ghosts of the Abyss) is a 2003 American documentary film produced by Walden Media. It was directed by James Cameron after his 1997 film Titanic. During August and September 2001, Cameron and a group of scientists staged an expedition to the wreck of the RMS Titanic and dived in Russian deep-submersibles to obtain more detailed images than anyone had before. Using two small, purpose-built remotely operated vehicles, the documentary offers glimpses into the Titanic wreck and, with CGI, superimposes the ship's original appearance on the deep-dive images.

The film is narrated by actor Bill Paxton, who joined Cameron on the expedition and previously played Brock Lovett in the 1997 film. The film premiered for IMAX 3D and was nominated for a BFCA award for Best Documentary. The submersibles Mir 1 and Mir 2 carried the filming team on 12 dives.