(CBS/AP)-- Mourners gathered Thursday for the funeral of James Gandolfini, where the creator of "The Sopranos" is due to memorialize the actor at the ceremony.
David Chase is one of four people scheduled to offer remembrances during the ceremony at the Cathedral Church of Saint John the Divine. The others are his widow, Deborah Lin Gandolfini, and two family friends.
The 51-year-old actor best known for his role as mob boss Tony Soprano in the HBO series died of a heart attack last week while vacationing with his son in Italy.
Invited guests began gathering early for the 10 a.m. funeral. Dick Cavett chatted with actor Steve Buscemi near the front of the church. Aida Turturro, who played Gandolfini's sister in "The Sopranos," was one of the first from that show's large cast to arrive.
Some 1,500 seats had been set up. The public was to be allowed in after the invited guests.
A private family wake was held for the actor Wednesday in New Jersey. Mourners at the invitation-only wake for family and friends left flowers at the Robert Spearing Funeral Home in Park Ridge.
The 51-year-old star of "The Sopranos" grew up in nearby Westwood. He died last week in Italy.
Broadway theaters dimmed their marquee lights Wednesday in memory of Gandolfini, who earned a Tony Award nomination in 2009 for his role in "God of Carnage."