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, but not so much in .

Production
According to the commentary, Leonardo Dicaprio was asked to voice his character but he couldn't, so the crew decided to break his head to christen the ship.