Iran's Supreme Leader has an active Facebook Page

His office frequently uses it to post pro-Khamenei "share" graphics
Including this rather unexpected post about his love of Les Misérables:

But it's increasingly being used to promote anti-US views & propaganda. Here's a sampling:
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Related: What Billboards Say About Iran's Foreign Policy
iranprimer.usip.org
Iran expert Robin Wright explores the rise of anti-American graphics on Iran's billboards and Khamenei's social media accounts.