Set to Sarah Blasko's cover of the Crowded House classic Don't Dream It's Over, the ad featured the wedding footage of real Australian same-sex couples. Unable to get married in Australia, the couples in the footage were married overseas.

"For every Bachelor and Bachelorette, vote yes," the text at the end of the ad reads.

The ad was authorised by Independent Member for Sydney and staunch Marriage Equality campaigner Alex Greenwich who said it aired during the Bachelor finale as an important reminder to viewers of the joy that love and marriage brings "not only to the couple, but to friends and family".

"At this time as postal surveys are being sent out, it's about helping put a face to the campaign," Greenwich said.

Emotions ran high on social media, with the reaction to the ad overwhelmingly positive.

The making of the Yes campaign ad was a "team effort," said Australian Marriage Equality's Michael Fairbairn.

Funded by donations, the ad was created by advertising agency Leo Burnett Melbourne, Airbag Productions and Arc Edit. Giving up one of their own advertising spots, The Bachelor's major sponsor Wrigley's Extra donated the airtime to the campaign.

The slot for the ad was donated to provide the opportunity to "convey the important message of marriage equality for all Australians," said Wrigley's Alison Levins.

"Wrigley has donated this spot because we simply believe that everyone deserves their own grand finale in love."

The Coalition for Marriage's controversial campaign defending traditional marriage was also aired during the finale, though many detractors were quick to point out the odd choice to air it during a show about a man dating 20 women.

The Coalition for Marriage did not respond to Fairfax Media's request for comment.