Alison Elizabeth "Ali" Larter (born February 28, 1976) is an American actress (actor) and former fashion model (Model (person)). Ali has played the characters Niki Sanders and then her identical long-separated sister Tracy Strauss on the NBC sci-fi drama Heroes (Heroes (TV series)).

Despite starting her career as a model (Model (person)), Ali soon transitioned herself into acting. Her film career began in 1999 (1999 in film) appearing in Varsity Blues (Varsity Blues (film)). She then appeared in the horror (horror film) film House on Haunted Hill (House on Haunted Hill (1999 film)) (1999) and the box office smash Final Destination (2000). After appearing in several high profile films, Larter then starred in Legally Blonde (2001) alongside Reese Witherspoon. Since then, she has starred in several projects including reprising her role in the sequel to Final Destination entitled Final Destination 2 (2003), starring in the romantic comedy A Lot Like Love (2005) and as the titular character in the Bollywood film Marigold (Marigold (2007 film)) (2007). As well as featuring in a number of indie movies including Confess (Confess (film)) (2005) and Crazy (Crazy (2007 film)) (2008), Larter has had her biggest commercial successes with the action-horror Resident Evil: Extinction (2007) and with the 2009 (2009 in film) thriller, Obsessed (Obsessed (2009 film)).

Larter has been named in "Sexiest Woman Alive" lists. Larter married her boyfriend of three years, Hayes MacArthur in a small ceremony in Maine on 1 August 2009.