She played two years at Cheshire (Connecticut) Academy and was the New England Prep School Player of the Year and MVP of the Class C Tournament in 2005. She was also a McDonalds All-Star nominee.
In last year's London Olympic Games Leedham averaged a team-high 16.2 points along with 5.2 rebounds and 2.2 assists while representing Great Britain.
Sun manager, Chris Sienko commented: "It's been a few years since we drafted her, so we are excited to see what she can bring to our team."
Leedham retweeted the Sun announcement to her Twitter followers yesterday:
We've signed Johannah Leedham to a rookie contract. Find out more: on.nba.com/13bz2ZR- ConnecticutSun (@ConnecticutSun) February 25, 2013