Salma Hayek is the latest celebrity to publicly call for the return of the Nigerian schoolgirls kidnapped by Islamist militants by holding up a sign at the Cannes Film Festival.

Members of the Boko Haram extremist group took the girls from a school in northern Nigeria in April. Their plight has resulted in a campaign called #BringBackOurGirls.

A slew of famous women have backed the campaign, including First Lady Michelle Obama, former secretary of state Hillary Clinton, and actresses Anne Hathaway and Angelina Jolie.
 
While attending the "Saint-Laurent" premiere on Saturday, Hayek held up a sign with the campaign's phrase. Last week, Russian model Irina Shayk posted a topless selfie on Facebook holding a similar sign.