On Wednesday at 7:45 p.m., Broadway theaters will go dark, dimming marquee lights to honor the memory of Philip Seymour Hoffman, the 46-year-old Oscar winning actor and three-time Tony Award nominee who was found dead in the bathroom of his New York apartment Sunday.

Since Sunday morning when Hoffman was discovered with a needle in his arm and surrounded by what police sources say were several bags of heroin, Hoffman’s fans and fellow stars have reacted with shock, sadness and mourning for the loss of a great acting talent.

“For me, he had such a high respect for his craft and for the creative process more broadly,” Sundance founder Robert Redford said. “He dug so deep into his characters: he brought darkness to light.” Hoffman was at Sundance recently to promote his new movies, “God’s Pocket” and “A Most Wanted Man.”

In New York, Mayor Bill de Blasio called Hoffman a quintessential New Yorker. “In the sense of, just, everything we love about this place– his creativity and his amazing ability to portray the human condition, and it’s absolutely tragic,” Blasio said.

“And I think– look, what I can say about his life is, even someone of that extraordinary achievement grapples with the demon of substance abuse. And we have to keep surfacing this reality in our society and getting people help.”

Blasio added: “There’s extraordinary organizations that help people– Alcoholics Anonymous and many others– and we’ve got to keep surfacing it as a public discussion, and also– anyone in our lives, we have to keep pushing them towards  these positive outcomes and solutions.”

Photo gallery: Actor Philip Seymour Hoffman dies at 46