Arnold Schwarzenegger voiced his congratulations for the signing of the Paris climate agreement on Saturday.

“Congrats Sec Gen Ban Ki-moon, @fhollande, @LaurentFabius & the negotiators at #COP21,” Schwarzenegger tweeted. “Now it’s time to get to work.” He also tweeted a GIF from “Terminator 2” in which his character gives a thumbs-up while being lowered into molten steel.

The landmark agreement, signed by 195 nations, commits nearly every country on Earth to curbing the amount of greenhouse gasses they produce in an effort to combat climate change.

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Negotiations have carried on in the French capital for the last two weeks, with President of the UN climate conference of parties (COP) and French Foreign Minister Laurent Fabius formally closing the talks on Saturday night to thunderous applause.

Schwarzenegger, one of the world’s most famous action stars and former Republican governor of California, has long been an advocate of climate change legislation and clean energy initiatives.

The “Terminator” star was in Paris for the conference and met with several prominent leaders, including Fabius himself. Earlier this week, he also posted a a call to action on climate change on his Facebook page.

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“Besides the fact that fossil fuels destroy our lungs, everyone agrees that eventually they will run out,” he wrote. “What’s your plan then?”

“I, personally, want a plan,” he continued. “I don’t want to be like the last horse and buggy salesman who was holding out as cars took over the roads. I don’t want to be the last investor in Blockbuster as Netflix emerged. That’s exactly what is going to happen to fossil fuels.”

Schwarzenegger then called on citizens to invest in clean energy and cited statistics about the number of people killed by pollution each year.