The Irish stout has found itself at the heart of a viral sensation, with celebrities like Ed Sheeran, Niall Horan, Jason Momoa, the Jonas Brothers and John Cena embracing the trend known as “splitting the G.” As part of the ritual, drinkers take their first sip of Guinness down to the middle of the ‘G’ on a branded pint glass, sparking social media buzz with a new wave of fans wanting to join in and “split the G.”