The attendance for the Middlesex v Surrey NatWest T20 Blast fixture at Lord's on Thursday 24 July is set to become the highest for any domestic Twenty20 fixture in the UK since the format was launched in 2004.
A full house at Lord's means the crowd size will break the previous record of 26,812 - also recorded for a Middlesex v Surrey fixture - in 2005.
The ground was a sell out last summer, but this is the first year that MCC has chosen to sell seat specific tickets for a Thursday evening T20 fixture, allowing more people to safely access the Ground.
Lord's has the highest capacity of any cricket Ground in the UK of 28,500.
It has been a summer of firsts for Lord's in domestic T20 cricket, after the Home of Cricket hosted the first ever t20 double-header to be played in England, when Middlesex took on Sussex and Essex on 17 May.
The Ground has also recorded strong ticket sales for international cricket in 2014, selling out for the first three days of the Investec Test match between England and Sri Lanka, the ODI between the same teams, and for the first four days of last week's England v India Investec Test.
Lord's also marked its 200th year in style with a sell out for the Bicentenary Celebration match between MCC and Rest of the World, with Sachin Tendulkar and Shane Warne captaining the two teams.
Derek Brewer, MCC Chief Executive, said: "We’re delighted to see this match sell out and it only serves to further prove how attractive a day or an evening at Lord’s is.
"We have seen fantastic ticket sales for all our international, bicentenary and domestic fixtures and the fact that we will have a capacity crowd for tonight’s match is testament to the excellent collaborative working relationship we have with Middlesex."