(written from a Production point of view)
Chris Hemsworth (born 11 August 1983; age 32) is the Australian actor who played George Kirk, the father of James T. Kirk, in J.J. Abrams' Star Trek. He is best known in his native Australia for his Logie Award-winning role as Kim Hyde in the Australian soap opera Home and Away. Though first acquiring recognition in the United States for his performance in the opening minutes of Star Trek, he has since acquired a higher profile for landing the title role of the film Thor, based on the popular Marvel Comics character.
Early life and career
Hailing from Phillip Island near Melbourne, Hemsworth starred as King Arthur in the short-lived Australian children's show Guinevere Jones. He then guest-starred on several other shows before winning his role on Home and Away. He also appeared in the Australian version of the dance competition series Dancing with the Stars, but he and his dance partner, Abbey Ross, were the sixth couple eliminated.
In 2007, Hemsworth shot an independent film called Ca$h! (formerly Root of All Evil) with Mike Starr. Although Star Trek was released first, Ca$h! was Hemsworth's first feature film and his first American production. It was released in March 2010.
Hemsworth had completed shooting on Star Trek and was back in Australia by 9 December 2007. Regarding his time in Hollywood, the actor says "I got lucky, I guess - right place, right time." 
After completing his work on Star Trek, Hemsworth landed a supporting role in David Twohy's film A Perfect Getaway, a thriller released by MGM in August 2009. This film stars Timothy Olyphant, who was considered for a role in 2009's Star Trek. 
In March 2009, Hemsworth was cast in the MGM horror/thriller film The Cabin in the Woods, co-written and produced by Joss Whedon (TV's Buffy the Vampire Slayer, Firefly). The film was directed and co-written by Drew Goddard, who worked with Star Trek director and producer J.J. Abrams as a writer and producer on the series Alias and Lost and as writer of the film Cloverfield. 
Hemsworth also played the lead role in the upcoming Red Dawn, a remake of 1984 thriller of the same name.  Hemsworth's co-stars in the latter film included Jeffrey Dean Morgan and Brett Cullen. Red Dawn is slated for release in November 2010, with The Cabin in the Woods following in January 2011, but financial issues at MGM may cause both films to be delayed to 2012.
It was announced on 16 May 2009 that Hemsworth was cast in the role of Thor, the mythical God of Thunder, in the upcoming film Thor, based on the Marvel Comics character. Filming on Thor ended on 6 May 2010, with the film set for release exactly one year later. Hemsworth reprised the role as Thor in the 2012 release The Avengers, in which his character joins forces with Iron Man (Robert Downey, Jr.), Captain America (Chris Evans), and others to form the titular superhero team. Damion Poitier cameoed during the end credits as Thanos. Both films will be distributed by Paramount Pictures.
Hemsworth was also seen in the short film Ollie Klublershturf vs the Nazis opposite Star Trek co-star Rachel Nichols. This project was written by Star Trek producer Damon Lindelof and cast by Star Trek casting director, Alyssa Weisberg. Both Lindelof and Weisberg are also serving as producers on the film.
Hemsworth appeared as the Huntsman in Snow White and the Huntsman with Charlize Theron and Kristen Stewart, with Universal intending to produce a spin-off film for him. Hemsworth will reprise the role in 2013's Thor: The Dark World, with Alice Krige joining the cast, and will also play James Hunt in Rush.