NOW: Grace Lee Whitney
In addition to acting, Whitney, now 84, is best known as the original mermaid for Chicken of the Sea tuna ad campaign. After her mysterious departure from the series, Whitney was invited to reprise the role of Janice Rand in 1979's "Star Trek: The Motion Picture." She went on to appear in four more "Star Trek" installments. —XFINITY Entertainment Staff (Photo by David Livingston/Getty Images)
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