AceShowbiz -

Appears to have smooth transition to film industry after her departure from "The O.C.", Mischa Barton has submitted into her growing resume another big screen stint she is about to carry out.

The beauty is reported to have landed deals to take part in dark comedy "The Sophomore", which was previously titled "Assassination of a High School President", for Yari Film Group. Here she will portray the most popular girl in her Catholic high school who persuades a sophomore reporter to investigate the theft of SAT exams that unexpectedly leads them into a sinister conspiracy.

Also set to star is Rumer Willis, the daughter of Bruce Willis who will appear in the project as the school's twisted principal, a Desert Storm veteran who can't let go of his glory days. The 18-year-old actress is said to play the troublemaking sidekick of Barton's character.

Principal photography has been moved to August under the direction of music video veteran Brett Simon who will helm from a script by Tim Calpin and Kevin Jakubowski, all making their feature film debuts.