Isaacs and Hemsworth will unveil the nominations at news conference at the Academy's Samuel Goldwyn Theater in Beverly Hills.
Hemsworth made his feature film debut in 2009's "Star Trek" but it was his title role in "Thor" two years later that propelled him to worldwide prominence. He reprised the character in the Marvel blockbusters "The Avengers' and "Thor: The Dark World."
Academy Awards for outstanding film achievements of 2013 will be presented on March 2 at the Dolby Theatre at Hollywood & Highland Center.