Roughly 48 hours after news first broke about Paul Walker's fatal car accident on Saturday, costar Vin Diesel posted to Facebook a brief and touching tribute to his fellow actor, friend, and, in his words, "brother."
Diesel and Walker first worked together on 2001's The Fast and the Furious, and had been shooting Fast & Furious 7 in Atlanta before Walker's accident. The status of that film remains unclear.
Just before posting his tribute, Diesel changed his cover photo to a shot of himself with Walker and longtime Fast and Furious costars Jordana Brewster and Michelle Rodriguez from the 2013 MTV Movie Awards in April.
Diesel also showed up to the makeshift memorial to Walker at the crash site to personally thank all of Walker's fans.