A pro-gay marriage ad narrated by actor Morgan Freeman is designed to influence decision makers, not voters, its backers have said.

The 30-second ad, produced by the Human Rights Campaign (HRC), the nation's largest gay rights advocate, touts the movement's historic November 6 gains and seeks to build momentum.

(Related: Morgan Freeman featured in gay marriage ad.)

Voters in 4 states gave marriage equality supporters significant wins. Maine became the first state to approve marriage equality by referendum. The victory is particularly poignant given that voters in 2009 repealed a marriage law approved by lawmakers. Voters also upheld laws approved by lawmakers in Maryland and Washington state. And Minnesotans rejected an effort to constitutionally ban such unions, sparking a new push to legalize gay nuptials in the state.

The ad is “really to capture the momentum of the incredible victories we had at the ballot box a few weeks ago,” HRC spokesman Fred Sainz told the Morning Sentinel.

“As Morgan Freeman says, there's still a journey ahead of us,” he added, a reference to the ad's transcript.

The commercial will air in Washington D.C., New York and Los Angeles.