Posting on their official Twitter account the brand wrote: "Everyone loves a wee Ginger."
The message included a baby emoji and a picture of a bottle of Irn-Bru in a pram.
Everyone loves a wee ginger 👶#RoyalBaby pic.twitter.com/Fu8Ym7c9o1
— IRN-BRU (@irnbru) October 15, 2018
User @jennysolomons then replied: "Wow, quick off the mark with that one! #royalbaby."
To which the Irn-Bru account posted:
As soon as we saw the news 🤣 pic.twitter.com/B92wTw49SA
— IRN-BRU (@irnbru) October 15, 2018
Though the Tweet has almost 500 likes, not everyone was happy with the joke with several people responding with calls for the old recipe to be brought back.
https://foodanddrink.scotsman.com/drink/15-facts-about-irn-bru/