In 1918, she left Europe for New York where she fashioned herself as a young, French lady who was 10 years younger than she really was. She first appeared on stage in 1921 and was picked up by a movie director pretty quick because she appeared in her first film the following year.
The DeMille/Goudal partnership ended bitterly when he started saying how difficult Jetta was to work with. He got so fed up that he fired her and voided her contract. This obviously did not sit well with Jetta, so she filed a lawsuit against him for loss of wages. DeMille countered saying that HE was the one who lost money on Jetta's movies because of her unprofessional behavior that caused filming delays. In a shocking settlement, Jetta was actually the winner of the case mainly due to the fact that DeMille couldn't positively prove that he lost money.
Because of her famous case and the gall she had in suing the famous director, some studios in Hollywood didn't want anything to do with Jetta. She did appear in the 1928 film, The Cardboard Lover with Marion Davies, but big roles were a thing of the past. Her last film was in a talkie called Business and Pleasure (1932) with Will Rogers and Boris Karloff.
She was interred at Forest Lawn Memorial Park Cemetery in Glendale, California.
Jetta was married once, to art director Harole Grieve (he was also one of the founding members of the Academy of Motion Picture Arts and Sciences). They were married in 1930 and once she was (forced) to retire, she and her husband ran an interior design company. They remained married until her death, and never had children.
Apparently her first name is pronounced "Zah-hetta." Yeah, I was pronouncing it wrong too.