A new ad from non-profit organization The Nation of Marriage (NOM) is making the rounds on YouTube.

The PSA, called “Gathering Storm,” features Americans opposed to gay marriage warning others that The group –whose mission is to protect marriage and the faith communities that sustain it –believes that granting marriage rights to gays will make it difficult for heterosexuals to live their lives normally.allowing gay marriage would threaten civil liberties.

But now celebs, like Sophia Bush, Sarah Chalke, Lance Bass, Alicia Silverstone, and Star Trek legend George Takei, are fighting back against NOM’s ad with their own parody PSA released in cooperation with FunnyOrDie.com.