Ron Livingston is an American character actor. On House, M.D., he portrayed famous tuberculosis doctor Sebastian Charles in the Season 2 episode TB or Not TB. Livingston has appeared in a number of supporting and guest roles during his career. However, he has had a number of lengthy or recurrent roles on such series such as That's Life, Band of Brothers, The Practice, Sex and the City and Standoff. He also had featured roles in the movies Office Space and Beat. Livingston is a busy actor and will be in four 2011 releases.