What happened to the other Heathers in "Heathers"?

Search: heathers

Why: Shannen Doherty (Heather Duke) became Shannen Doherty, and Winona Ryder (Veronica, not a Heather) became Winona Ryder.

Answer: Nothing:

• Kim Walker (Heather Chandler) was in a 1990 TV show of "The Outsiders" (based on the book / movie), followed by nothing. She died in 2001 of a brain tumor :(
  

• Lisanne Falk (Heather McNamara) was in Say Anything... for a hot second and played nobody's wife in Suicide Kings.
  

Source: IMDb

The More You Know: Don't forget Christian Slater! He was mentioned in Clueless (1996).