About
Jaimie Alexander is an American actress best known for her roles in action and superhero projects. She gained initial recognition for her role as Jessi on the television series *Kyle XY*. Alexander is widely recognized for portraying Lady Sif in the Marvel Cinematic Universe films *Thor*, *Thor: The Dark World*, and *Thor: Love and Thunder*, as well as in the *Agents of S.H.I.E.L.D.* television series. From 2015 to 2020, she starred as the lead in the NBC series *Blindspot*, showcasing her action and dramatic abilities.
Career Timeline
*Kyle XY* breakthrough role
Landing the role of Jessi on *Kyle XY* gave Alexander her first real recognition. It opened the door for bigger roles and boosted her early career.
Marvel's Lady Sif debut
Becoming Lady Sif in *Thor* marked a significant step up. She became part of a major franchise, increasing her visibility and earning potential.
*Blindspot* lead role
Starring in *Blindspot* as the lead was a career high point. The series provided steady work and broadened her audience appeal.
Returns to MCU
Reprising her role as Lady Sif solidified her standing. This also boosted her visibility even as other projects winded down.
Established Action Star
Jaimie continues to work steadily in action and genre roles. She's a recognizable face and a reliable performer.
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Last updated: February 24, 2026