Sen. Hillary Rodham Clinton, D-N.Y., called Reeve an "exemplary, wonderful woman," adding, "I admired her courage, taking care of Chris all those years," the New York Post reported Tuesday.
Reeve took care of her paralyzed husband for more than a decade until his death. She was diagnosed with cancer in August and died last month at age 44.
Actor Daryl Mitchell, who was paralyzed in a motorcycle accident, said Reeve gave him inspiration to keep going.
"I never met anybody with so much heart and determination," he said. "Watching her, I realized I can still maintain my family."
Longtime friend CNN anchor Paula Zahn said despite all the cruel blows handed to her, Reeve "never gave in to pity."
Also in attendance at the New Amsterdam Theatre were Barbara Walters, Katie Couric, Joe Torre, Glenn Close, Philip Seymour Hoffman, Matthew Broderick, Susan Sarandon, Blythe Danner, Robert Kennedy Jr., Lance Armstrong, Kenneth Cole, Alec Baldwin, Mark Messier and Al Roker.