The actress will appear in the season three premiere, portraying Tyler's (Michael Trevino) date to Elena's (Nina Dobrev) 18th birthday party, Zap2it reports.
Roberson was previously rumoured to be playing the part of Becky, one of Stefan's (Paul Wesley) former flames. However, the role of Becky is still in the casting stages.
Last week, Vampire Diaries's executive producer Julie Plec compared Tyler and Caroline (Candice Accola) to Romeo and Juliet, explaining that the pair will be caught between their parents in the upcoming season of the CW series.
Dobrev recently revealed that the chemistry on The Vampire Diaries is shifting, claiming that the events of last season have thrown the show off-balance.
The Vampire Diaries will begin its third season on September 15 on The CW.
Watch a short clip from season two of The Vampire Diaries below: