Audrina Patridge has landed her first film role.

“The Hills” star has joined the cast of “Into the Blue 2,” MGM Home Entertainment and Bluewater Prods.’ sequel to the Jessica Alba starrer.

The film revolves around Sebastion (Chris Carmack, “The O.C.”) and Dani (Laura Vandervoort, “Smallville”), a married couple hired as professional divers to search for Columbus’ hidden treasure. To their horror, they learn that their wealthy employers have a much more terrifying agenda.

Patridge will play a no-nonsense, beautiful beach babe whose boyfriend caters to her every command.

Charles Winkler is directing and producing. Hudson Hickman, Craig Roessler and Sarah Berrisford are executive producers.

Patridge, repped by APA and John Carrabino Management, is the first reality celeb from “The Hills” to get an acting role in a film. The show’s Lauren Conrad appeared in the 2007 Regency comedy “Epic Movie” as herself.

“The Hills,” MTV’s highest-rated series, recently was picked up for a fourth season, which will debut in August.

The first “Blue,” which MGM made with Columbia in 2005, took in a little more than $18 million at the U.S. boxoffice, then made a killing on DVD on the strength of a bikini-clad Alba and the ab-tastic Paul Walker.