Read more Arnold Schwarzenegger: I'll Be Back for Sequel to 'Terminator: Genisys'

"Thank God," Schwarzenegger said. "It sucked." His schedule as California governor had kept him from filming scenes for the 2009 McG-directed film.

As far as the first three films in the franchise, the actor explained that he enjoys them all for different reasons and would be unable to pick which is best. "I think that the three that I was in, they all three had their own personalities and interesting storylines," he said.

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Terminator Salvation, starring Christian Bale and Sam Worthington, grossed $125.3 million domestically and is generally considered by fans to be a disappointment. It carries a 33 percent approval rating on movie-aggregate site Rotten Tomatoes.

Paramount's Terminator Genisys, directed by Alan Taylor (Thor: The Dark World) and also starring Emilia Clarke, Jai Courtney and Jason Clarke, hits theaters July 1. Schwarzenegger's interview can be seen in the video below.

Email: Ryan.Gajewski@THR.com

Twitter: @_RyanGajewski