The video advert slams Shelly Moore, who is running for State Senate in the upcoming Wisconsin elections, over accusations she will increase state taxes, with the money going to pay for "illegal aliens" to have access to free healthcare.
The promo is from a conservative group called Citizens for a Strong America and features a voiceover which distinctly sounds like the Shawshank Redemption actor.
However, his publicist has confirmed Freeman was not hired to voice the campaign.
The rep says, "A political ad running in Wisconsin by a conservative group narrated by someone trying to sound like Morgan Freeman was not narrated by Mr. Freeman. Morgan Freeman did NOT narrate that ad."
It is the second time the star has been forced to deny he's voiced a political campaign - he received an apology from Republican B.J. Lawson last year (10) after the politician used a "voice double" of Freeman on his TV promo.