Philip Seymour Hoffman Funeral Precedes Memorial Service Later This Month

Mark Cuthbert/UK Press/Getty

updated 08/25/2015 AT 8:16 PM ET

originally published 02/07/2014 AT 6:30 AM ET

Philip Seymour Hoffman, who fiercely protected his private life, will be mourned behind closed doors.

A private funeral for the actor will be held Friday for 400 people at the Church of St. Ignatius Loyola in Manhattan. It’s the same church that hosted the funerals of Jacqueline Kennedy Onassis, Lena Horne and Aaliyah.

Hoffman, 46, was found dead Sunday of an apparent heroin overdose in his apartment. He had been open about a past that included addiction and rehab. He leaves behind his partner of 15 years, Mimi O’Donnell, and their three children.

More tests are needed to determine what exactly killed Hoffman, who was found with a syringe in his arm and what authorities said were dozens of packets of heroin in his apartment. Autopsy results were inconclusive, authorities said this week.

A larger memorial service is being planned for later this month. On Thursday evening, family and close friends gathered for a private wake at the Frank E. Campbell Funeral Home in Manhattan, which has orchestrated funerals for celebrities including Kennedy Onassis and James Cagney.

Mark Cuthbert/UK Press/Getty
Among the mourners was Amy Adams, who costarred with Hoffman in the films Doubt and The Master. Other notables in attendance included Cate Blanchett, Joaquin Phoenix and Diane Sawyer.

Hoffman was nominated for Academy Awards four times and won the Oscar for Best Actor in 2006 for his portrayal of writer Truman Capote in Capote. He also was nominated three times for a Tony Award.

Broadway honored him Wednesday night by dimming its lights for a minute, a memorial common for renowned stage actors. Thespians also gathered that night for a vigil.

For much more on this story, including details of Hoffman’s final weeks and his life offscreen as a father of three, pick up this week’s issue of PEOPLE, on newsstands now

This object displays a Brightcove video


• PHOTOS: His Life in Pictures

• MOVIES: 9 Iconic Roles That Defined His Career

• TRIBUTE: A Heartbreaking Loss of a Genius, Says PEOPLE’s Critic

• RELATED: Celebrities Pay Tribute on Twitter

• NEWS: Philip Seymour Hoffman Found Dead of Apparent Overdose” “” ]