He spent last season on loan in Scotland with Ross County and Hibernian, playing 25 games in total.

"I see Stoke City as a Premier League club like a lot of people do. I want to be part of something special here this year," Clarke told the club website.

Clarke was due to spend next season with Hibernian as well but Arsenal activated a summer break clause last week.

He is the second summer signing by the Potters following experienced Cardiff City centre-back Aden Flint.

"Harry is young and hungry to succeed," said manager Michael O'Neill.

"He's a fantastic athlete with a great deal of potential and we're delighted to have secured his services for the forthcoming season.