The role is one of lead character Elle Wood's sorority sisters and comes with featured parts in five of Legally Blonde's musical numbers, The Post reported.
While she's no stranger to the stage thanks to her Spring 2006 Idol run, Bennett realizes she would be increasing her workload if cast for the musical since she'd be expected to perform eight times a week.
"You kind of get nervous when you're there," she told The Post about her audition. "I mean these people do this every day."
Nicknamed "Princess P" while on Idol -- the same moniker given to her 2007 debut album -- Bennett told The Post she should hear if she landed the role sometime this week.
Originally a 2001 film starring Reese Witherspoon, Legally Blonde's Broadway adaptation has recently received some reality attention from MTV.
MTV aired a performance of the Broadway production in its entirety last October, and the broadcast also featured behind-the-scenes footage, a pre-show, and a red carpet-like event hosted by The Hills co-stars Lauren "L.C." Conrad, Audrina Patridge and Whitney Port.
In addition, MTV recently concluded casting for an upcoming Grease: You're the One that I Want-like reality competition show that will aim to find an actress to replace Lauren Bell Bundy as the lead in Legally Blonde's production.
DISCUSS AND COMMENT ON THIS STORY Reality TV World now offers Facebook Comments on our stories. To post a comment, log into Facebook and then 'Add' your comment. To report spam or abuse, click the 'X' in the upper right corner of the comment box. Get more Reality TV World! Follow us on Twitter, like us on Facebook or add our RSS feed.