(written from a Production point of view)
Julie Cobb (born 29 May 1947; age 69) played Yeoman Leslie Thompson in the Star Trek: The Original Series episode "By Any Other Name". She filmed her scenes on Friday 10 November 1967 at Desilu Stage 10. She is the daughter of noted actor Lee J. Cobb, the mother of Star Trek: Voyager guest star Rosemary Morgan (whom she accompanied to the set, as Morgan was a minor at the time)  and the ex-wife of James Cromwell, who played Zefram Cochrane.
More recently Cobb appeared in the 2007 film The Happiest Day of His Life, co-starring Harry Groener and Seymour Cassel, and the 2008 film Jelly along with her daughter Rosemary, and Rick Overton (from Trekkies).