The famous American sports and political actor, Arnold Schwarzenegger, underwent an open-heart surgery, on an emergency basis, on Thursday.

The 70-year-old star underwent surgery at a Los Angeles, Calif., Sanatorium.

Schwarzenegger was scheduled to undergo heart valve replacement only at first, but doctors performed an open heart operation that lasted several hours.

This is not the first time that the star undergoes heart surgery, since he underwent a process to replace the aortic valve in 1997.

Schwarzenegger is reported to be recovering and said after he woke up: “I’m back.”

Schwarzenegger is known for his roles in several popular films, including Terminator and Conan the Barbarian.

He was governor of California for two terms from 2003 to 2011 before returning to his role in the movie “The Expendables.”

In May, Schwarzenegger was honored in France and received the Order of the National Choral Honor, the nation’s highest medal, for his efforts to protect the environment.