He has boasted that, like Winston Churchill, he can drink an “awful lot” at lunch and still work afterwards - but Boris Johnson has decided to cut the booze until after Britain leaves the EU.
On the campaign trail, the Prime Minister told nurses in Nottinghamshire he's given up alcohol "until we get Brexit done."
However he has not gone completely teetotal, having been pictured sipping whisky during a distillery visit in Scotland on Thursday.
Mr Johnson last cut down on booze when he was preparing to run for Tory leader. He has previously said his favourite wine is Tignanello, a favourite of the Duchess of Sussex.
Speaking to the nurses in King's Mill Hospital, Mr Johnson began by discussing smoking habits in Ashfield, adding he is "not certain" about vapid: " It might just encourage them to get into nicotine."
Mr Johnson then said: "what about alcohol?" before adding: "I've had to give it up until we get Brexit done."
He did not clarify whether he meant January 31 or the end of the transition period.