AnytimeCostumes.com has started promoting its "Call Me Caitlyn" costume for Halloween 2015, months before Oct. 31.

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It is similar to the outfit that Caitlyn Jenner wore on her Vanity Fair when she officially came out as transgender.

Spirit Halloween is also said to be planning a Caitlyn costume.

But many people have taken to social media, posting their outrage.

A petition on Change.org has been started saying, "Your profit will only lead to greater transphobia and marginalization of an already at risk community."

The petition has more than 1,700 supporters a day after it was started. Organizers have set a goal of 2,500 supporters.