Philip Seymour Hoffman Funeral: Cate Blanchett, Joaquin Phoenix and More Say Final Farewell to Actor

Private memorial was held Friday at St. Ignatius of Loyola Catholic Church

Philip Seymour Hoffman's friends, family and fellow actors said goodbye to the late actor on Friday.

Cate Blanchett, Mary-Louise Parker, Spike Lee, Ethan Hawke, Joaquin Phoenix, Jake Gyllenhaal and Michelle Williams were photographed making their way in to a private funeral service for the Oscar winner held at St. Ignatius of Loyola Catholic Church in Manhattan. Julianne Moore, Amy Adams, Justin Theroux and one of the Olsen twins were also reportedly in attendance. 

Hoffman's loved ones have asked that in lieu of sending flowers, mourners make contributions to causes that were close to Hoffman's heart, the DreamYard Project and the Christopher & Dana Reeve Foundation.

The actor is survived by 10-year-old son Cooper, 7-year-old daughter Tallulah, 5-year-old Willa and the mother of his children, Mimi O'Donnell. A rep for Hoffman, who was just 46 at the time of his death, said in a statement that the family "wishes to thank everyone for their continued support and good wishes." An additional memorial service is in the works for later this month.

The Capote star was found dead last Sunday in his New York City apartment of an apparent overdose, and he had struggled with addiction problems in the past. He attended rehab after college and stayed sober for 23 years. In May 2013, however, he sought treatment after relapsing with heroin.

An autopsy on his body was inconclusive, so additional tests, including a toxicology study, must be conducted in order to determine what officially caused the actor's death.

In his apartment, however, investigators found more than 50 envelope bags of heroin, as well as several empty bags, syringes and prescription medications, and a syringe was still in his arm when his body was discovered. Four people have since been arrested in connection to the beloved actor's death and will remain in custody until their Feb. 14 hearings.

Hoffman leaves behind an impressive body of work, which includes critically acclaimed roles in both film and theater. But Aaron Sorkin, who has in the past struggled with addiction himself, hopes that another part of Hoffman's legacy will be "that 10 people who were about to die who won't now."

Sorkin wrote, in a heartfelt piece for Time, about how Hoffman once told him, "If one of us dies of an overdose, probably 10 people who were about to won't." The Oscar-winning writer explained that Hoffman "meant that our deaths would make news and maybe scare someone clean."