Penn & Teller

Penn & Teller is a comedian magician partnership, performing and hosting poker events in Mars Vegas. In 3009, they hosted the Universal Poker Championship. Teller died sometime before this event, though according to Penn, this didn't really change their act much.

Trivia
** Technically not true as Conan O'brien had part of his head above the top of the jar as well.
 * While the entire act was credited for the film, only Jillette provided his voice for the role, as Teller was dead in the film, while also actually being silent in their normal act.
 * Penn is the only character thus far to have part of their head above the jar's tip.