Matt Jefferies
Matt Jefferies (1921–2003) designed the first Enterprise and its sets, including the bridge and shuttlebay. He also designed most other ships of The Original Series, including the Shuttlecraft Galileo and the Klingon Battle Cruiser.
When Gene Roddenberry got the chance to produce a second Star Trek television series in 1977, he hired Jefferies again to upgrade the Enterprise. Andrew Probert and Richard Taylor refined this redesign when Phase II became The Motion Picture, but they respected the outlines of Jefferies’ refit.
One of Jefferies’ rejected designs from 1964 became the ring-shaped predecessor to the Enterprise in 1979, when it was deplayed on the wall of the recreation deck in The Motion Picture.