Eoin Morgan has been named as Middlesex's limited overs captain ahead of the 2014 season, replacing Neil Dexter.
The news comes after he was recently named as Stuart Broad's vice-captain for England's tour of the Caribbean and the ICC World Twenty20 in Bangladesh.
Middlesex expect him to be available for all but three of their Royal London One-Day Cup and NatWest T20 blast matches when he is not on England duty.
In 2009, Morgan was appointed as Middlesex vice-captain to Shaun Udal but he stood down after he started playing regularly for England and was awarded a central contract.
Middlesex managing director of cricket Angus Fraser is confident that Morgan is a strong appointment.
"Middlesex CCC are fortunate, in Eoin, to have one of the game’s best young cricket brains at the club," he said.
"This talent has been identified by England too and everyone at Middlesex CCC is chuffed that Eoin is regarded so highly.
"I, like many people who know him, am confident that he has what it takes and will prove to be a fine captain for both teams.
"When Neil Dexter informed me of his desire to stand down as limited over captain before Christmas we were lucky that we did not have to look far for a replacement.
"I immediately contacted Eoin to see whether he was interested and his response was a firm ‘yes’.
"We thought it best to wait until Eoin had returned from Australia, so that we could have a face to face chat, before making any announcements. Everyone at the club is excited at the prospect of working under Eoin.
"Middlesex CCC totally understands Neil’s position and his desire to focus on his own game.
"Captaining a team is an honour but it is also stressful and tiring. I know that everyone at the club would like to thank Neil for the significant contribution he has made to Middlesex CCC in the past three years.
"Neil has led by example and his values have helped create a good culture at Middlesex CCC.”
Morgan added: "I am really excited about the prospect of captaining Middlesex CCC. Captaincy has always interested me and it is something I am looking forward to developing over the coming months.
"I have been at Middlesex CCC for a long time now and in the past I have shown leadership with my bat. I now feel I can expand that leadership role by captaining the side."
© Cricket World 2014