The Russian student, Varvara Karaulova, accused of attempting to join the Islamic State jihadist group, pleaded guilty, a Moscow city court judge said Tuesday.
"She fully admits her guilt," the judge said at the hearing.
The student's father, Pavel Karaulov, claimed earlier on Tuesday that she tried to join the militants because she fell in love with an IS recruiter. The student admitted her mistake after being returned home, he added.
A second-year philosophy student with an interest in radical Islamic ideas and the Arabic language, Karaulova had gone missing on May 27, 2015, after failing to attend university classes.
On June 4 she was detained in Kilis, a town on the Turkish-Syrian border, traveling as part of a group of fourteen Russian nationals who were presumably planning to join the Islamic State.
Shortly afterwards Karaulova flew to Moscow in the company of Interpol and Turkish immigration officials. She returned to Moscow on June 11.
A criminal investigation was opened against Karaulova on October 23, and she was taken into custody until December 23.