She was born in St. George, Utah, and raised in Overton, Nevada, some 60 miles from Las Vegas. The youngest of eight children, Amanda has six older sisters and one older brother. She has a background in dancing jazz and ballet. She moved to Los Angeles to seek further acting opportunities. She married film director and writer Jordan Alan on April 29, 2006. Righetti is a close friend of actress Alexa Davalos, who was Righetti's bridesmaid at her wedding.
Working as a film producer, Righetti oversaw production on numerous TV commercials and short films. After securing a role in the pilot for a proposed, but ultimately scrapped series by the name of No Place Like Home, Righetti caught the eye of FOX executives. She played a recurring character in teen drama The O.C., was a regular in the short-lived primetime soap North Shore and in late 2005, Righetti starred in FOX's drama Reunion.
In 2006, Righetti signed on to star as the female lead in horror sequel Return to House on Haunted Hill. The film was released straight to DVD in October 2007. In April 2008, she was cast as the female lead in the slasher reboot Friday the 13th. Production ended in June 2008 and the film was released to theaters on February 13, 2009. Since September 23, 2008, Righetti has been a regular cast member on the CBS hit series The Mentalist. While working on The Mentalist, she has starred as the female lead in three movies to be released in 2011.
Righetti appeared on the cover of the November 2005 issue of FHM magazine. She was ranked #59 and #84 on the FHM 100 Sexiest Women of 2005 and 2006,respectively. Righetti has appeared on the covers of LAX, Maxim, and Vegas Magazine. In 2009, she was also ranked #65 on Maxim's Hot 100
Filmography
2012 Shadow
2011 Captain America: The First Avenger
2011 Cats Dancing on Jupiter
2011 Wandering Eye
2011 The Chateau Meroux
2009 Friday the 13th
2008 Role Models
2008 Matter
2007 Pipeline
2007 Return to House on Haunted Hill
2005 E-train
2003 No Place Like Home
1996 Kiss & Tell
1995 Love and Happiness
Television
2008–Present The Mentalist
2007 K-Ville
2007 Marlowe (2007)
2006 Entourage
2006 Enemies
2005 Reunion
2005 Romy and Michele: In the Beginning
2004-05 North Shore
2003-05 The O.C.
2003 No Place Like Home
2001 CSI: Crime Scene Investigation
Source:wikipedia