Cast of Requiem for a Dream

Ellen Burstyn plays Sara Goldfarb.

Jared Leto portrays Harry Goldfarb.

Jennifer Connelly takes on the role of Marion Silver.

Marlon Wayans brings Tyrone C. Love to the screen.

Christopher McDonald plays Tappy Tibbons.

Sean Gullette portrays Arnold the Shrink.

Mark Margolis takes on the role of Mr. Rabinowitz.

Aliya Campbell plays Alice.

Louise Lasser plays the character of Ada, an enigmatic woman who forms a brief connection with Harry during his downward spiral.

Marcia Jean Kurtz portrays Rae, a neighbor of Sara's who offers her support and companionship.

Janet Sarno plays the role of Mrs. Pearlman, one of Sara's acquaintances who becomes concerned about her well-being.