Myanmar opposition leader Aung San Suu Kyi will deliver her first speech outside the country since at least 1988 before a U.N. labor conference in Geneva on June 14, the head of the U.N. labor office said Tuesday.

Suu Kyi's speech to the annual conference of the Geneva-based U.N.'s International Labor Organization will be a key element of her first trip abroad since 1988, when she returned to Myanmar to care for her ailing mother.

"This will be the first place where she will speak internationally after leaving Myanmar," Juan Somavia, the ILO's director-general, said Tuesday.

After becoming leader of Myanmar's pro-democracy movement, Suu Kyi was placed under house arrest for 15 of the following 22 years of military rule. Her confinement also prevented her from attending the ceremony in Oslo, Norway, where she was awarded the 1991 Nobel Peace Prize.

Over the past couple of decades, Suu Kyi was only rarely allowed to receive visitors or to communicate with the outside world at her lakeside home in Yangon, the capital.