Meet Ashton Kutcher’s love interest in the Steve Jobs biopic: Ahna O’Reilly

Ashton Kutcher has a new leading lady — on the big screen.

Yesterday, Ahna O'Reilly was on the San Francisco set of "JOBS," the biopic about Apple co-founder Steve Jobs, which stars Kutcher as the tech genius. (The film has also been referred to as "Jobs: Get Inspired" as well as "jOBS"). The 26-year-old actress — who got her big break playing Elizabeth Leefolt in the Oscar-award winning film "The Help" — plays Chris-Ann Brennan, a painter who was Jobs' high school girlfriend and gave birth to his daughter, Lisa, in 1978.

[Related: Matthew Modine joins Steve Jobs biopic]

In a subject sure to be covered in the film, Jobs famously denied paternity of Lisa for years, going so far as swearing in court papers that he was infertile. Brennan reportedly collected welfare to support the child until Jobs later acknowledged the child as his own. Jobs went on to marry Laurene Powell and they had three children.

On the set, O'Reilly was dressed in faded bell-bottom jeans that were covered in patches, including a peace sign. She also had on a skimpy purple crochet halter top and sandals.

[Related: Ashton Kutcher in character as Steve Jobs]

This will be O'Reilly's biggest role to date. In addition to "The Help," the rising star has had small parts in "Forgetting Sarah Marshall," "Nancy Drew" and the upcoming "The Time Being." She also has a very famous movie star ex-boyfriend: James Franco. O'Reilly and Franco went public with their romance in 2006. After dating for years, Franco revealed in an interview with Playboy that they quietly ended things .

"It's over," perennial student Franco told the lad mag in 2011. "We'd been living together in L.A. and then came to New York to go school for two years. Then I signed up for more school at Yale. I think that was it for her."