|Susannah York (1939 - 2011)
Mother of Orlando Wells
|Thursday Theatre: The Wings of the Dove (1965) [Milly Theale]: Dies of an unspecified illness. (Thanks to Gordon)
Mystery and Imagination: The Fall of the House of Usher (1966) [Madeleine Usher]: Dies of shock after escaping from the tomb, after awakening from a deathlike trance; she dies as she collapses on top of her brother (Denholm Elliott). (I haven't seen this version, so I don't know how closely it follows the original story.)
The Maids (1974) [Claire]: Given on overdose of sleeping pills in her drink by her sister (Glenda Jackson), with Susannah's full knowledge and consent; the movie ends shortly after Susannah drinks the drugged wine, but before her actual death.
Superman (1978) [Lara]: Killed in an explosion (along with the rest of the planet's population) when the planet Krypton explodes. (Note: She reappears as a hologram in Superman II.)
The Awakening (1980) [Jane Turner]: Stabbed in the throat by a shard of falling glass, after a supernatural force causes her to fall through the window to the ground below. (Thanks to Rodzilla)