Rojas' television career began in the early 1990s appearing in a string of juvenile telenovelas for Mexican channel Televisa such as the music-industry fantasy Alcanzar una estrella. A number of supporting roles followed including in the Christian Bach and Saúl Lisazo telenovela Bajo un mismo rostro, currently re-airing on Univision Tlnovelas.
Rojas found bigger roles after she left Televisa in the late 1990s for rival network Azteca, eventually getting the starring role in the popular Como en el cine in 2001 opposite Mauricio Ochmann.
Rojas next starred in a trio of telenovelas for American network Telemundo for which she is probably best known in this country and internationally: the cop telenovela Ladrón de Corazones in 2003, the mystical soul-swapping El Cuerpo del Deseo in 2005 opposite Mario Cimarro, and the lurid and fun Miami-novela Pecados Ajenos in 2007.
It was a few months after the conclusion of Pecados Ajenos in 2008 that Rojas was first diagnosed with breast cancer.
She would make a comeback to the screen, returning to Azteca in the leading role in Entre el amor y el deseo in 2010.
Her final roles are in a pair of Miami telenovelas co-produced by Venevision (now Cisneros Media) and Univision: Rosario in 2013 and the yet-to-be-released thriller Demente Criminal.