Conor McGregor has issued an apology to his fans who haven't been able to get their hands on his new whiskey.

The MMA fighter released his own whiskey brand earlier this year.

According to his PR company, Proper No. Twelve Irish Whiskey has sold hundreds of thousands of bottles since its launch.

 
 
 
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Proud day! Today “Project Notorious” finally comes to life with the introduction of my new Irish Whiskey; Proper 12. I have spent a lifetime studying this craft under the tutelage of my late Grandfather on my mother’s side, Christopher “Jakes” Moore, and I have put just over 3 years into the making of this liquid alone. I introduce to you @ProperWhiskey! Proper Irish Whiskey, from a Proper Irish man! Born and bred in the Dublin suburb of Crumlin, Dublin 12. Proper Twelve is who I am. I wanted to make an Irish whiskey emblematic of Irish culture as a whole, and something that would showcase the great skill we possess of distilling the best Whiskey in the entire world. One of the many amazing skills we possess on this great island. Proper Twelve is crafted at Ireland’s oldest distillery. It is made with the Isle’s freshest spring water and finest golden grain and single malt – it is pure liquid gold! This is Ireland’s whiskey, and it is my gift to the world. Another proud announcement for me in this venture is that with each case we sell, my company will donate to the first responders in each district the case is sold in. This donation plan will be in operation all over the world. These are the men and women who run into buildings while everyone else is running out. They are our real life heroes – Proper Heroes I look forward to joining all of you in a PROPER salute soon. Sláinte 🥃🇮🇪

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The distillery bottled what was estimated to be enough product for six months of sales in Ireland and the United States, but this hasn't been enough to deal with demand.

Conor McGregor says plans are in place to have the product restocked in Ireland before Christmas.

He also says the brand is launching in the UK, Australia, New Zealand, Russia, and Canada in 2019.