Hanna has played with her sister Jenn since the 2003-2004 season, when she played lead for the team, which included Dawn Askin and second and Joëlle Sabourin at third. In their first season, the team lost the semi-final at the 2004 Ontario Scott Tournament of Hearts.
After a number of lineup changes, Stephanie was promoted to the team's second position in 2007 and then to third in 2008. After the team skipped the 2010-11 season, Letendre (who left the team after the 2005 Hearts) was brought back to play third, and Stephanie was bumped to second position. During this period, the Hanna team would not return to the Tournament of Hearts.
At the end of the 2011-12 season, both Stephanie and her sister Jenn announced they would not curl competitively in the 2012-13 season, and had no intention of curling competitively in the near or immediate future.  However, the Hanna sisters and Letendre teamed up with Lisa Paddle to curl in the 2013–14 curling season.