Popsugar Celebrity Mark Ruffalo Leonardo DiCaprio at Christie's Art Auction | Pictures Leo's Star-Studded Auction Makes Millions For the Environment May 14, 2013 by Meghan Rooney 0 Shares Chat with us on Facebook Messenger. Learn what's trending across POPSUGAR. View On One Page Photo 1 of 21 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrows Keys → 1 Leonardo DiCaprio cohosted an art auction with NYC's Christie's to benefit his foundation. 0 previous images -10 more images Previous Next Start Slideshow Join the conversation Chat with us on Facebook Messenger. Learn what's trending across POPSUGAR.