Matthew `` Matt '' Camden ( played by Barry Watson ) ( born 1980 ) is Annie and Eric 's firstborn . In the beginning of the series , Matt is a junior in high school . Matt sacrifices his school time to help others ; if they wished to remain anonymous , he would respect that and not even tell his father . During high school , he bounces from job to job , including tutor and Dairy Shack delivery driver . He is not always a star student , but he manages to graduate at the top of his class and get accepted for a White House internship in Washington , D.C. with First Lady Hillary Clinton . He returns to Glenoak for college , rooming with friend and fellow `` P.K. '' John Hamilton . Matt 's new uncle , Dr. Hank Hastings ( who had actually delivered him ) , helps him get a job in the hospital cafeteria ; during his time there , he decides to become a doctor . He ends up working at a women 's clinic with Hank , beginning by helping save the life of a woman who could not get anyone but Matt to take her symptoms of an ectopic pregnancy seriously .

Question: who played the oldest brother in 7th heaven
Answer: Barry Watson