At age 14, she appeared in her first fashion show at a boutique in Gijón. As a result, she became interested in the subject of fashion; at 17 she moved to Madrid, and two years later to Paris to work at fashion magazines such as
Givenchy and
Madame Figaro. She composed her first song in 2001. In mid-2006, she began a short-lived musical career under the stage name La Perra. She took part in some reports for the
Antena 3 television program
PuntoDoc. An appearance on ''
on LaSexta led to her being noticed by the creative team for the teen drama series Física o Química, and she made the leap to acting. She went on to act in and Supermodelo 2006. She has appeared on the cover of the Spanish edition of Elle'' on several occasions, and posed nude in a special issue to raise awareness of
water scarcity and pollution issues for
Expo 2008 in Zaragoza. She made her film debut in 2009 with
After, for which she was nominated for Best New Actress at the
24th Goya Awards. She followed this with ''
in 2011 and The End'' in 2012. In 2015, she starred in the first season of the Antena 3 series
Bajo sospecha, playing an undercover police officer partnered with
Yon González. After its renewal for a second season, it was published that Romero would not continue in the project, and would be replaced by
Olivia Molina. A year later, it was announced that she had signed on for the miniseries
La luz de la esperanza on
La 1, alongside
Isak Férriz,
Natalia de Molina, and . In 2020, it was confirmed that she would reprise her role as Irene Calvo Azpeolea in
Física o químicaː El reencuentro for the platform
Atresplayer Premium. ==Personal life==