Jaimie Alexander

Jaimie Alexander was born in Greenville, South Carolina, but moved to Grapevine, Texas, when she was four years old. She is the fourth child and only girl in a family of five children. Alexander first got into acting in grade school, where she took theater for fun. Alexander stated that she was kicked out of theater when she was in high school because she could not sing, so she instead went into sports. When she was 17, she substituted for a friend at a meeting with a scouting agency and she met her manager, Randy James, who sent her some scripts. After her graduation from Colleyville Heritage High School, a year and a half later, she moved to Los Angeles to pursue her acting career.Her career was launched in 2003, when she was cast in the leading role of Hanna Thompson in the low budget, award-winning film The Other Side. According to the movie's commentary, she was originally at the audition to help out by reading against the male actors, but the director Gregg Bishop decided to cast her in the leading role after hearing her perform the lines. Alexander's next role was in the movie Squirrel Trap where she played Sara, the love interest of the main character, David, who is a socially introverted genius portrayed by Keith Staley. This was soon followed by a guest appearance in It's Always Sunny in Philadelphia, where she portrayed a femme fatale in the role of Tammy, who through a combination of seduction and threats manipulates one of the main characters. She also has a small part in an episode of Standoff.

She appeared in the series Watch Over Me where she portrayed the character of Caitlin Porter. In 2006, she had her second lead role in the horror film Rest Stop where she portrayed Nicole Carrow, a girl who escapes from home and goes on a trip with her boyfriend, which is unexpectedly interrupted at a rest stop by a deranged serial killer. In 2007, she had her third lead role, also in a horror film. In Hallowed Ground she played Elizabeth Chambers, a girl stranded in a small town inhabited by a sect that plans to use her as a vessel for the rebirth of their founder.

In 2007, she began starring in the ABC Family television show Kyle XY as Jessi, a troubled show-off with superhuman powers who is trying to find her way in the world, with increasing cooperation and eventual romance with her male counterpart Kyle. Her role generated a large fan base hoping to see a spin-off show for her character. She also has had guest roles on the show CSI: Miami where she played Jenna York, a flight attendant involved in a murder case; and in Bones where she played Molly Briggs, a student connected to the victim of the episode.

In September 2009, Alexander was cast as Lady Sif in the live-action superhero film, Thor, directed by Kenneth Branagh and released in May 2011. She reprised the role in the sequel Thor: The Dark World, released in November 2013. She reprised the role in two special crossover guest appearances in the TV series Agents of S.H.I.E.L.D., in episodes first aired on March 11, 2014, and March 10, 2015.

In July 2010, Alexander was cast in the independent comedy-drama film, Loosies co-starring Peter Facinelli and directed by Michael Corrente. In October 2010, Alexander joined the cast of Nurse Jackie in a sizeable story arc as Jackie's (Edie Falco) wild, immature sister-in-law, Tunie Peyton. In 2011, she joined the cast of Covert Affairs for three episodes of the second season.

Alexander appeared in the 2013 film Savannah directed by Annette Haywood-Carter, about Ward Allen (Jim Caviezel), a real-life early 1900s aristocrat who starts an unexpected partnership with Christmas Moultrie (Chiwetel Ejiofor), a freed slave. She portrayed deputy sheriff Sarah Torrance in The Last Stand, alongside Arnold Schwarzenegger.

In 2015, Alexander began starring as Jane Doe in the NBC series Blindspot. She made an uncredited cameo appearance as Sif in the TV series Loki in June 2021 and voiced the character in the TV series What If...?. She reprised the role in Thor: Love and Thunder (2022).