In a brief statement, Twentieth Century Fox Television wrote: "Today, [executive producer] Ryan Murphy and Lea Michele gathered the cast, crew and producers of 'Glee,' along with colleagues from the network and studio, to share memories and music in an emotional celebration of the life of Cory Monteith.
"We thank the public for their continue outpouring of love and support as we grieve our friend and colleague during this difficult time," the statement said.
The memorial was closed to the public and details were scarce, although it was said to have been held on the Fox lot in Century City.
Monteith died in Vancouver on July 13 at age 31. An autopsy later found he had died of a toxic combination of heroin and alcohol.
Michele and Monteith, who played boyfriend and girlfriend on "Glee," were reported to have an on and off romantic relationship in real life. In a magazine interview conducted shortly before Monteith's death, Michele called him "the best person I know."