Some time later, at the beginning of the ’70s, he began to work regularly with small roles on television and participating in different theatrical works.
In 1976 he joined the cast of one of his first feature films, the war film “The eagle has arrived“, where he shared a poster with Michael Caine, Donald sutherland Y Robert Duvall. Then titles like “I never promised you a rose garden“(1977) and the film by Disney “Peter and the Dragon Elliot“(1977).
In those years, Jeff was part of the original cast of the musical “Grease“, where he played Kenickie, and later reprized this role in the 1979 film adaptation of the same name (“Grease“), whose cast headed John Travolta.
The success of this film, made it well known to the general public, popularity that was increased when participating in the television series “Cab“between 1978 and 1982, where he played Bobby wheeler, and for whose performance he was nominated twice (1978 and 1979) for the awards Golden Globes.
His career in film and television continued with ups and downs, his participation in the telenovela being remembered “The Bold and the Beautiful“(1989-1990) and in the science fiction series”Babylon 5“(1994-1998).
In 2008, Conaway participated in the reality show “Celebrity Rehab with Dr. Drew“, in which his addiction to alcohol and cocaine was made public.
In regards to your personal life, Jeff he was married to the actress Rona Newton-John (sister of actress and singer Olivia Newton-John), from whom he divorced in 1985. In August 1990 he married Kerri Young.