Leonardo DiCaprio's head

Leonardo DiCaprio was an actor in the 20th and 21st centuries. In the 31st century, he exists as a head in a jar, which was used to christen the Titanic in 3000. He was later seen in the Head Museum. Fry apparently liked his work in the 1997 film, but not so much in .

Production
According to the commentary for "A Flight to Remember", Leonardo DiCaprio was asked to voice his character but he couldn't, so the decided to break his head to christen the ship.