Actors, philanthropists, politicians and climate experts joined the People's Climate March in Manhattan on Sunday, bringing even more attention to a protest attended by 310,000 people.
From Mark Ruffalo and Joseph Gordon-Levitt, to United Nations Secretary-General Ban Ki-moon and former Vice President Al Gore, the notable attendees had their portraits snapped and shared across social media.
Here we present the images captured by Mashable photographers, as well as those curated from around the web.
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