A City Council meeting this week in Tucson, Arizona, where officials discussed letting residents vote on designating Tucson a so-called sanctuary city for immigrants was interrupted by protesters opposing the measure.

A video of an attendee in a green shirt, Alex Kack, laughing at the protesters quickly went viral.

Kack has since received praise on Twitter, and the green shirt he was wearing sold out at Nordstrom.

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At a City Council meeting this week in Tucson, Arizona, officials discussed whether to include a measure on the November ballot for residents to vote on making Tucson a so-called sanctuary city for immigrants.

In a video posted by a journalist named Nick VinZant, two protesters can be seen interrupting the meeting, apparently to express support for President Donald Trump's stance on immigration. An attendee in a green shirt, Alex Kack, can also be seen laughing.

Read more: Trump announces plan to release detained migrants into sanctuary cities

The video of "green shirt guy," as Kack has been dubbed, has since gone viral, and people have chimed in with support.

Even celebrities like Chrissy Teigen and Mark Ruffalo shared their love for #GreenShirtGuy.

Not only are celebrities taking notice, but the green Original Penguin shirt he was wearing has sold out on Nordstrom's website.

The shirt is the No. 1 seller in the "men's contemporary and designer polo shirts" category on Amazon.

Penguin also offered to send Kack some shirts.

Since the video went viral on Twitter, Kack has talked about why he laughed in that moment and why he supports Tucson becoming a sanctuary city.

"Ultimately I think the majority of this country, regardless of their political affiliation, understands that the loudest voices happening right now are kind of ridiculous," he told News 4 Tucson. "And I think that that laughter is resonating because I think that's kind of how people feel right now."

"I think it's a bold statement of morality that our community needs to make," Kack told Mashable about the measure, adding, "Families deserve to be together and all people deserve the right to feel safe."