Boyd Holbrook (right) says he's proud of his castmate ... "It is true that I pulled out of a small amount of press on Saturday, as this type of social commentary is new to me," the actor wrote.

In the highly anticipated film "A Complete Unknown," Boyd Holbrook portrays Johnny Cash and brings to life the music legend's early interactions with Bob Dylan, played by Timothée Chalamet.

The new clip introduces us to Boyd Holbrook in the role of Johnny Cash, who is as cool, calm and collected as you'd expect as someone portraying the iconic singer-songwriter behind hits such as "I ...