The move is to celebrate the Queen's Jubilee.
Greene King is running a special event at pubs across the area – but you’ll need to be quick because the deal only lasts for today (Monday, May 30).
Punters will be able to get a pint of Greene King IPA for free by using the special code ‘1952’.
The plan had originally been to charge just 6p for a pint – but that idea has now been scrapped.
A Greene King spokesperson said: “Our pub and brewery teams are so excited to be celebrating the Queen’s Platinum Jubilee with a variety of events this week.
"One of the ideas we had was for a promotion in 400 of our managed pubs where customers could buy one pint each of Greene King IPA for 6p today – the same price it was in 1952. We thought this was a great way to celebrate this remarkable occasion and we’ve been thrilled at the response from customers.
"However, we have some good news for everyone, which is that we will now be giving the Jubilee first pint of Greene King IPA away free of charge today, as we now understand it’s not permissible under the licensing act to charge the 6p.
The Greene King-owned pubs in and around Milton Keynes are: The Caldecotte Pub & Grill at Caldecotte Lake, Furzton Lake pub, The Kingfisher in Newport Pagnell, The Eager Poet at Neath Hill, Kensington at Great Holm, the Cricketers in Oldbrook, The Old Swan in Shenley Road, Bletchley, Tawny Owl on Walnut Tree, the Green Man in Lavendon, the Clocktower in Emerson Valley, Bell Inn in Woburn, the Cock Hotel in Stony Stratford and Ye Olde Swan in Woughton-on-the-Green.