In 2014, Mercado featured in her first campaign, for designer denim brand
Diesel, which she was selected by
Nicola Formichetti. Its success captured the attention of IMG Models President
Ivan Bart and landed her a modelling contract with IMG in August 2015. She has since starred in several campaigns for
Nordstrom as well as in former
Vogue Paris editor
Carine Roitfeld's
CR Fashion Book where she was photographed by
Michael Avedon. Jillian is currently represented by CAA Worldwide. In March 2016, Mercado was announced as one of three models to appear in the latest campaign for
Beyoncé's official website, promoting merchandise for the singer's new single and 2016
Formation world tour. Later that spring, she was featured in a
Target Corporation marketing campaign that debuted during Telemundo's
Billboard Latin Music Awards. In September 2016, Mercado appeared in the editorial features of
Glamour and
Cosmopolitan. By the end of that year, Mercado appeared on her first cover for
Posture Magazine. In February 2017, Mercado appeared in an editorial for
Galore magazine. In 2019, Jillian Mercado started to play Maribel on
The L Word: Generation Q. In 2022, she played the lead character of Sonya in the short film
My Eyes Are Up Here. == Personal life ==