Hanoi had not previously confirmed that Doan Thi Huong was Vietnamese, saying only that it was in touch with authorities in Malaysia, where Kim Jong Nam was murdered on Feb. 13. Vietnamese embassy officials met her on Saturday.
"Her health is stable. During the meeting with embassy officials, Doan Thi Huong said she was being taken advantage of and thought she was starring in a comedy video," the foreign ministry statement said.
Indonesian embassy officials met the other suspect, Siti Aishah, and she also told them she had thought she was part of a reality television show, Reuters reported.
The estranged half-brother of North Korean leader Kim Jong Un was killed at Kuala Lumpur international airport using VX nerve agent, Malaysian police say.