Beaks here...

Marvel Studios has just issued a press release confirming what we've been hearing for months now: Natalie Portman will play Jane Foster in Kenneth Branagh's THOR.

According to Marvel, Foster will be "updated" for this film. I suppose this means she'll now be a doctor instead of a nurse? We do know she won't be Donald Blake's love interest, but that's only because Thor's human alter-ego isn't being written into Branagh's film.

Portman is the third actor confirmed for THOR. She joins Chris Hemsworth (Thor) and Tom Hiddleston (Loki). The film is currently scheduled for release on May 20, 2011. For more info, here's the press release in its entirety:

Natalie Portman to Star as Jane Foster in Marvel Studios’ THOR

Marvel Studios announced today that Academy Award® nominated actress Natalie Portman has been cast to star as Jane Foster in the studio’s highly anticipated movie THOR. In the early THOR comics, JANE FOSTER was a nurse who became Thor's first love. The character will be updated for the feature adaptation. Portman will star opposite Chris Hemsworth who will play Thor and Tom Hiddleston who will play the villain Loki. Kenneth Branagh will direct the film.

Marvel Studios’ Kevin Feige will produce THOR. Principal photography for the film is set for early 2010. The film will be released in the US on May 20, 2011 and distributed by Paramount Pictures.

Marvel Studios expands its film universe with a new type of superhero: THOR. This epic adventure spans the Marvel Universe; from present day Earth to the realm of Asgard. At the center of the story is The Mighty Thor, a powerful but arrogant warrior whose reckless actions reignite an ancient war. Thor is cast down to Earth and forced to live among humans as punishment. Once here, Thor learns what it takes to be a true hero when the most dangerous villain of his world sends the darkest forces of Asgard to invade Earth.

Portman will next be seen starring in Jim Sheridan’s BROTHERS opposite Jake Gyllenhaal and Tobey Maguire. She recently wrapped production on HESHER, starring Joseph Gordon-Levitt and executive produced by her production company handsomecharlie films, and Don Roos’ LOVE AND OTHER IMPOSSIBLE PURSUITS, which also she executive produced. In 2004, she won a Golden Globe Award for Best Supporting Actress as well as an Academy Award nomination in the same category for CLOSER. She also earned critical acclaim for her role in GARDEN STATE and is most well known for her role as Queen Padme Amidala in the STAR WARS Trilogy. Other film credits include THE OTHER BOLEYN GIRL, V FOR VENDETTA, COLD MOUNTAIN, ANYWHERE BUT HERE, HEAT, BEAUTIFUL GIRLS, and THE PROFESSIONAL.

THOR is one of a continuing slate of films being produced by Marvel Studios based on the Marvel characters, including IRON MAN 2 on May 7, 2010, THE FIRST AVENGER: CAPTAIN AMERICA on July 22, 2011, and THE AVENGERS on May 4, 2012.

Portman is represented by Brillstein Entertainment Partners, CAA and George Sheanshang.