A celebrity baker has stepped in to save the day after a couple were refused a wedding cake by a Christian baker when he realised they were lesbians.

Duff Goldman, of the US TV series, Ace of Cakes, offered to make the couple a cake, free of charge, after he heard about their story. He even offered to deliver it for free.

Aaron Klein, the owner of Sweet Cakes in Grensham, Oregon, came under investigation this week after a complaint was filed by one of the brides-to-be.

The woman who filed the complaint said that Mr Klein was happy to serve her before, but that he changed his mind when he found out that she was getting married to a woman.

“I saw this story and I was like, “Wait–I can do something, there’s injustice involving a cake!,”Duff Goldman, owner of Charm City Cakes said to the Huffington Post.

“For a cake decorator to really feel like he really needed to take a stand…it just makes absolutely no sense,” he continued. “It’s petty, it’s small.”

Reading about the story, he Tweeted: “Hey, @HuffPostFood, can you get the couples’s contact info? Offer is on the table. Cake is on me, and I’ll deliver it.@Charm_CityCakes.”

Ace of Cakes is a US reality TV show on the Food Network. The show focused on the operations of Duff Goldman’s custom cake shop, Charm City Cakes, in Baltimore, Maryland

The Oregon Attorney General’s civil enforcement office will investigate the case of Mr Klein, and make a ruling on whether Mr Klein he broke the law by doing so. He admits declining to make the cake.

Discrimination based on sexual orientation is illegal under the Oregon Equality Act 2007.

Mr Klein said in an interview with KATU: ”They’ve made a choice to do what they’re doing, I’m making a choice to not be a part of it.”

Whilst denying calling the couple “abominations,” he said: “I apologized for wasting their time and said we don’t do same-sex marriages.

He said that he would rather lose out on trade, and stick to his religious beliefs.

A judge is expected to preside over the case.