SEE RELATED STORY: Extensive search underway for Fort Hood soldier from Houston missing since April
Mexican-American film actress Salma Hayek posted to her Instagram, with 15 million followers, the following pictures within 24 hours of each other in an effort to bring attention to her disappearance.
Hayek has really increased the visibility on this case because of her 15-million people following on Instagram.
Relatives of Guillen are holding onto hope that she is still alive.
Her sister, Mayra Guillen, said she spoke to Vanessa the day before she reported her missing on April 22.
The founder of lifestyle brand SpoiledLatina also posted to her Instagram, trying to bring the matter to the public's attention.
Fort Hood officials and special agents from the U.S. Army Criminal Investigation Command are asking for the public's help to find Vanessa.
Guillen's family said she was having a problem with someone else at Fort Hood before her disappearance.
A reward of up to $15,000 is now being offered for credible information on her whereabouts.
Vanessa was last seen wearing a black shirt. She is described as being of Hispanic descent, 5 feet 2 inches, and 126 pounds with black hair and brown eyes.
Anyone with information is asked to contact Army CID Special Agents at 254-495-7767 or the Military Police Desk at (254) 287-4001.
Guillen's family hosted a peaceful rally at the Catholic Church in Killeen on Friday.
Hundreds chanted her name, wearing shirts with her face on it.
The family said this is such a mystery because this isn't like Vanessa at all.
All of her things were found in her armory except for her cell phone.
FIEL in Houston is helping the family to try to get them answers and help from federal investigators in this case.
The family has started a White House petition, which has surpassed 144,000 signatures and a website for Vanessa's case.
Fort Hood is around 200 miles northwest of Houston.
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