Servilia Caepionis (107-42 BC), mistress of Caesar and mother of his assassin, Marcus Junius Brutus
A very fictionalized Servilia appears in The Gates of Rome, by Conn Iggulden and the rest of books of the Emperor Series of Novels.
A highly fictionalized version of Octavia's early life is depicted in the 2005 television series Rome, in which Octavia of the Julii (Kerry Condon) commits incest with her brother, has a lesbian affair with Servilia of the Junii (the series' version of Servilia Caepionis) and a romantic relationship with Marcus Agrippa (based on the historical Marcus Vipsanius Agrippa).
Servilia of the Junii, a fictionalized depiction of Servilia Caepionis in the Rome 2005-2007 TV series