Sage Stallone Laid to Rest in Private Funeral

7/21/2012 12:19 PM PDT

Sage Stallone -- Laid to Rest in Private Funeral

Sylvester Stallone and several close family members mourned the passing of Sage Stallone today, at a private funeral held in Brentwood, CA.

The memorial services took place at St. Martin of Tours Catholic Church. Sly, his wife Jennifer Flavin, and his brother Frank Stallone were all present. 

36-year-old Sage -- who appeared in "Rocky V" with his dad -- died July 13 at his L.A. home. The circumstances surrounding his death are still being investigated.

In a previous statement Sylvester Stallone said, "This agonizing loss will be felt for the rest of our lives. Sage is our first child and the center of our universe and I am humbly begging for all to have my son's memory and soul left in peace."