Marco Perella (born May 18, 1949)[1] is an American character actor and author, who has played a variety of small roles in motion pictures shot in Texas.
He is best known for his role in Boyhood (2014), playing an abusive alcoholic second husband, Professor Bill Welbrock, and for his bestselling book, Adventures of A No Name Actor (2001), a humorous autobiography recounting his struggles in the acting world.
Perella had a recurring role, as Cobalt, in TV's Walker, Texas Ranger (1993–1999) starring Chuck Norris; he also appeared in another episode of Walker, Texas Ranger entitled 'No Way Out' as Zeke, a mercenary working for Caleb Hooks (Michael Parks).
He also worked with director Richard Linklater several times, playing Tom Watson in Fast Food Nation (2006) starring Greg Kinnear, Bruce Willis, and Catalina Sandino Moreno, as Donald in A Scanner Darkly (2006) starring Keanu Reeves, Winona Ryder, and Robert Downey Jr., and as Professor Bill Welbrock, the abusive alcoholic second husband, in Boyhood (2014) starring Ellar Coltrane, Patricia Arquette, and Ethan Hawke.
His autobiography, Adventures of A No Name Actor, in which Perella humorously recounts his struggles in the acting world, was published in 2001 and became a bestseller.