Alanna Masterson was born on June 27, 1988, in New York City, to Carol Masterson and Joe Reaiche, a Lebanese-Australian former professional rugby league footballer who played for the Sydney Roosters and the South Sydney Rabbitohs.
As the younger sister of Jordan Masterson, and half-brothers Danny Masterson and Christopher Masterson, Alanna grew up surrounded by the entertainment industry, with her brothers starring in popular television shows in the late 1990s and early 2000s.
This exposure to the world of acting sparked Alanna's passion for the craft, as she spent a significant amount of time on set with her brothers, observing the filming process and learning from the professionals.
Masterson's big break came when she was cast as Tara Chambler in the AMC television series The Walking Dead, a role she began playing in the show's fourth season. Her performance was well-received, and she was subsequently promoted to a series regular for the fifth season, with her name added to the main credits in the seventh season.
In addition to her work on The Walking Dead, Masterson also appeared in the fourth season of the ABC series Mistresses, taking on a recurring role.
Throughout her career, Masterson has demonstrated her versatility as an actress, taking on a range of roles and projects, and solidifying her place as a talented and dedicated performer in the entertainment industry.