Following her separation, Garner dated her Alias co-star Michael Vartan from August 2003 to March 2004.
Over the course of his relationship with Alias co-star Jennifer Garner, he never made any public appearances with her. Garner confirmed their relationship in August 2003. Vartan began dating Garner in mid-2003, and though rumors of their break-up began in March 2004, Garner only confirmed the end of their relationship in August 2004.
Couple Profile Source