George Diller is a retired public relations specialist who worked in the NASA Public Affairs Office at the Kennedy Space Center. He provided public announcements and commentary before and during launches from the Kennedy Space Center, including the space shuttle and unmanned spacecraft such as the Mars rovers Spirit and Opportunity, and was known as "The Voice of Kennedy Space Center". Diller provided launch commentary from the launch of STS-28 through STS-135 the final launch of the program. He is also known for his "liftoff line" he gave as the shuttle and other vehicles lifted off the pad.
In addition to shuttle missions, Diller served as commentator during the roll-out, launch delays, and successful launch of Ares I-X in October 2009 as well as planetary missions such as Juno, GRAIL, Mars Science Laboratory, and MAVEN. Diller lists among his favorite moments, the launch of the Hubble Space Telescope aboard STS-31, Magellan and Galileo probes which he had much involvement in, and his first shuttle launch commentary for the STS-27 mission.
Diller's final launch commentary was for the Cygnus CRS OA-7 mission on April 18, 2017.