Middlesex opener Sam Robson has signed a two-year deal keeping him at Lord's until the end of the 2015 domestic season.
The 24-year-old was the Panthers' star batsman in 2013, putting himself in the international frame with 1,180 first-class runs at an average of 47.2. His previous deal was scheduled to expire at the end of the 2014 English summer.
Australian-born right-hander Robson qualified to play for England in August after meeting ECB criteria for time spent in the UK over a four-year period.
Despite being born and brought up in Sydney, he has never played first-class cricket in his native country and England have emerged as his most likely international suitors after he was named in their Performance Programme squad to tour Down Under this winter.
And Middlesex Managing Director of Cricket Angus Fraser said Robson had the potential to play Test cricket in the future.
"Sam's cricket has developed considerably in the last three years and he is now one of the leading top order batsmen in LV=CC Division One" said the former England fast bowler.
"This progress and quality has been recognised by England. The selection is richly deserved.
"Sam is the sort of cricketer Middlesex CCC wants playing for them and hopefully he will play a leading role in the Club achieving its goal of challenging for and winning trophies."
Adam Rossington, the club's young wicket-keeper batsman, has also signed a new contract with the club, also tying him to the Panthers until the end of the 2015 summer.
Middlesex have finished third in the LV= County Championship's top division for the past two seasons and are expected to challenge for the title again next season.
The club celebrate their 150th anniversary in 2014.