Jennifer Garner penned a moving tribute to someone very special on Tuesday, when she mourned the loss of film director, Ivan Reitman. The Ghostbusters producer died at the age of 75 and Jennifer remembered what a wonderful man he was with a heartbreaking message. MORE: Jennifer Garner celebrates special birthday with memorable before-and-after photos The mom-of-three knew the celebrated man behind the likes of Stripes and Kindergarten Cop on both a professional and personal level and said she was pained that she didn't seize the opportunity to see him before he passed away. WATCH: Stars gone too soon Alongside a photo with Ivan, Jennifer wrote a lengthy note, which read: "I loved Ivan Reitman. As a director, Ivan had such an astute eye he noticed every thought crossing my mind in every take. "He would rush in with so many notes and ideas my brain would explode trying to keep track and execute – getting a laugh or good job from Ivan equaled Day Made.