Sacheen Littlefeather. Alt link. THR.
Ms. Littlefeather was most famous as Marlon Brando’s stand-in at the 1973 Academy Awards. She read part of his prepared speech refusing the award. (The speech was eight pages long, but “but telecast producer Howard Koch informed her she had no more than 60 seconds”.
Robert Brown. Other credits include an episode of a minor 1960s SF TV series, “Primus”, “Run for Your Life”, “Perry Mason”…
…and “Mannix” (“The Girl in the Polka Dot Dress”, season 7, episode 1.)