James Byron Dean was born on February 8, 1931, at the Seven Gables apartment on the corner of 4th Street and McClure Street in Marion, Indiana, the only child of Winton Dean and Mildred Marie Wilson. He was primarily of English descent, with smaller amounts of German, Irish, Scottish, and Welsh ancestry. Six years after his father had left farming to become a dental technician, Dean and his family moved to Santa Monica, California. He was enrolled at Brentwood Public School in the Brentwood neighborhood of Los Angeles, California, but transferred soon afterward to the McKinley Elementary School.

Dean's first television appearance was in a Pepsi Cola commercial. He quit college to act full-time and was cast in his first speaking part, as John the Beloved Disciple, in Hill Number One, an Easter television special dramatizing the Resurrection of Jesus. Dean worked at the widely filmed Iverson Movie Ranch in the Chatsworth area of Los Angeles during production of the program, for which a replica of the tomb of Jesus was built on location at the ranch. Dean subsequently obtained three walk-on roles in movies: as a soldier in Fixed Bayonets!, a boxing cornerman in Sailor Beware, and a youth in Has Anybody Seen My Gal?  While struggling to get jobs in Hollywood, Dean also worked as a parking lot attendant at CBS Studios, during which time he met Rogers Brackett, a radio director for an advertising agency, who offered him professional help and guidance in his chosen career, as well as a place to stay.  In July 1951, Dean appeared on Alias Jane Doe, which was produced by Brackett. In October 1951, following the encouragement of actor James Whitmore and the advice of his mentor Rogers Brackett, Dean moved to New York City. There, he worked as a stunt tester for the game show Beat the Clock, but was subsequently fired for allegedly performing the tasks too quickly. He also appeared in episodes of several CBS television series The Web, Studio One, and Lux Video Theatre, before gaining admission to the Actors Studio to study method acting under Lee Strasberg.  Proud of this accomplishment, Dean referred to the Actors Studio in a 1952 letter to his family as "the greatest school of the theater. It houses great people like Marlon Brando, Julie Harris, Arthur Kennedy, Mildred Dunnock, Eli Wallach... Very few get into it ... It is the best thing that can happen to an actor. I am one of the youngest to belong." There, he was classmates and close friends with Carroll Baker, alongside whom he would eventually star in Giant (1956).  Dean's career picked up and he performed in further episodes of such early 1950s television shows as Kraft Television Theatre, Robert Montgomery Presents, The United States Steel Hour, Danger, and General Electric Theater. One early role, for the CBS series Omnibus in the episode "Glory in the Flower", saw Dean portraying the type of disaffected youth he would later portray in Rebel Without a Cause. This summer 1953 program was also notable for featuring the song "Crazy Man, Crazy", one of the first dramatic TV programs to feature rock and roll. Positive reviews for Dean's 1954 theatrical role as Bachir, a pandering North African houseboy, in an adaptation of Andre Gide's book The Immoralist, led to calls from Hollywood.

Answer the following question by taking a quote from the article: What was James Dean's first job?
Dean's first television appearance was in a Pepsi Cola commercial.