Spanning twenty-four hours, HEIGHTS follows five New Yorkers challenged to choose their destiny before the sun comes up the next day.
| Actor | Role |
|---|---|
 Glenn CloseDiana | Diana |
 Elizabeth BanksIsabel | Isabel |
 Eric BogosianHenry | Henry |
 Jesse BradfordAlec | Alec |
 Matthew DavisMark | Mark |
 Andrew HowardIan | Ian |
 Thomas LennonMarshall | Marshall |
 John LightPeter | Peter |
| SSusan MalickRachel | Rachel |
 James MarsdenJonathan | Jonathan |
 Michael MurphyJesse | Jesse |
 Denis O'HareAndrew | Andrew |
 Isabella RosselliniLiz | Liz |
 George SegalRabbi Mendel | Rabbi Mendel |
 Rufus WainwrightJeremy | Jeremy |
 Angel DesaiLaura | Laura |
 Katie KreislerHelen | Helen |
 Regina SchneiderAmanda | Amanda |
 Jim ParsonsOliver | Oliver |
| PPhilip TaborPaul | Paul |
 Jonathan WalkerMichael | Michael |
 Chandler WilliamsJuilliard Macbeth | Juilliard Macbeth |
 Bess WohlJuilliard Lady Macbeth | Juilliard Lady Macbeth |
| DDaniel NeidenWedding Rabbi | Wedding Rabbi |
| RRachel SiegelAutograph Seeker | Autograph Seeker |
 Jordi VilasusoBenjamin's Ex | Benjamin's Ex |
 Nat DeWolfBenjamin's Ex | Benjamin's Ex |
 Joel de la FuenteBenjamin's Ex | Benjamin's Ex |
| MMelanie R. OrrScorned Woman | Scorned Woman |
| JJane NicholsGuest 1 | Guest 1 |