James Cameron has reached the bottom of the Pacific Ocean's Mariana Trench.
The Avatar director unveiled plans to dive to the bottom of the Challenger Deep, the deepest part of any ocean, in early March.
Cameron officially arrived at the bottom of the trench at 6pm ET (11pm BST) on Sunday (March 25) and returned to the surface in the early hours of Monday morning.
"All systems okay," he is quoted as saying on reaching the end of his seven-mile journey, while a post on Cameron's Twitter account read: "Just arrived at the ocean's deepest pt. Hitting bottom never felt so good. Can't wait to share what I'm seeing w/ you @DeepChallenge"
Cameron spent six hours in the trench capturing footage for a documentary, also collecting samples from the ocean floor during his visit.
The director is only the second person to make the dive, and the first to do it alone. The first dive took place in 1960 when U.S. Navy Lt. Don Walsh and Swiss oceanographer Jacques Piccard made the journey to the Mariana Trench.
Cameron's movie Titanic is set for a re-release in 3D on April 6 in the US and April 5 in the UK.
He has previously revealed that the sequel to his record-breaking sci-fi movie Avatar will take place in an underwater world.
Watch a National Geographic video about James Cameron's deep-see dive below:
