As they arrived, O’Donnell was seen carrying little Willa, who had fallen asleep on the drive over.
Many of Hoffman’s former co-stars followed, including Cate Blanchett, Meryl Streep, Michelle Williams, Justin Theroux, Amy Adams, Joaquin Phoenix, Ben Stiller and others.
The two friends who found Philips's body after an alleged heroin overdose on Sunday, playwright David Bar Katz, and Hoffman’s assistant, Isabella Wing-Davey, were also in attendance.
A private funeral will take place before noon on Friday at New York’s St. Ignatius of Loyola Catholic Church, where funerals for Jacqueline Kennedy Onassis and Aaliyah were held.
A public memorial for the Oscar winner is believed to be in the works.