Amanda Righetti was born on April 4, 1983, in St. George, Utah, and raised in Nevada, just outside Las Vegas. She is the youngest of eight children, with six sisters and one brother. Her father, Alexander Dominic Righetti, is of Italian descent, while her mother, Linda Carol Chisum, has German, French, and English ancestry.

Amanda Righetti began her career as a model at the age of 14 and later moved to Los Angeles at 18 to pursue acting. Her breakout role came as Hailey Nichol in the popular teen drama "The O.C.".

Her career continued to flourish with roles in the primetime soap opera "North Shore" and the Fox drama series "Reunion." In 2008, she was cast as Grace Van Pelt in the CBS series "The Mentalist," a role that earned her widespread recognition and solidified her status in the industry.

She also starred in the 2009 reboot of "Friday the 13th" as the female lead, Whitney Miller.

In 2024, Amanda Righetti portrayed Nelle Reagan, the mother of President Ronald Reagan, in the biopic "Reagan," highlighting her ability to tackle complex characters. Her net worth is estimated at $3 million, and she resides in Las Vegas, Nevada, where she enjoys an elegant yet understated lifestyle. Her hobbies include swimming, dancing, singing, and horse riding.

Amanda Righetti married director and writer Jordan Alan on April 29, 2006, on the Hawaiian island of Oahu. They welcomed their son, Knox Addison, in 2013, but the couple filed for divorce in 2017.

Her career is marked by numerous achievements, including winning the Best Actress award at the New York International Independent Film & Video Festival for her role in the short film "Matter."