Former Iron Man and Marvel Cinematic Universe star Robert Downey Jr. has taken to social media to pay tribute to Jimmy Rich, his longtime personal assistant that tragically passed away in a car accident yesterday, May 5. Rich was the Oscar nominee’s personal assistant for almost two decades, credited with being his right hand man on every Marvel Studios movie in which Downey appeared in addition to other films like Zodiac, Kiss Kiss Bang Bang, and The Singing Detective. Downey posted a touching memorial to him on Instagram, calling him a brother and “beloved by all who experienced his singular character.” His post can be found below.

A post shared by Robert Downey Jr. Official (@robertdowneyjr)

Rest In Peace, Jimmy. You have been such a great friend to all of us at Marvel Studios for so many years. Your love and light were an inspiration to everyone that knew you. We will miss you. pic.twitter.com/O45mKJA1gj