(written from a Production point of view)
Rhoda Williams (3 July 1930 – 8 March 2006; age 75) was an actress and voice artist who provided alien vocals for Star Trek IV: The Voyage Home and Star Trek V: The Final Frontier. She received no credit for her work.
As a vocalist, she also played evil step-sister Drizella in the 1950 Disney classic Cinderella. As an actress, she appeared in such films as National Velvet (1944), Our Wines Have Tender Grapes (1945), Space Master X-7 (1958), High School Hellcats (1958), and Critic's Choice (1963, with Stanley Adams and Grace Lee Whitney). She also made several appearances on the television western series The Big Valley, including a 1966 episode with William Shatner, Bill Quinn, and Jason Wingreen and a 1969 episode with Vince Deadrick, Sr. and Susan Oliver. Her other television credits include guest appearances on The Twilight Zone, The Dick Van Dyke Show, Felony Squad (starring Robert DoQui), and Marcus Welby, M.D (with Byron Morrow and Andrew Robinson).
Williams died of natural causes in 2006. She was 75 years old.