<page_title> Alyson Hannigan </page_title> <section_title> Stage </section_title> <table> <cell> 2004 <col_header> Year </col_header> </cell> <cell> When Harry Met Sally... <col_header> Title </col_header> </cell> <cell> Theatre Royal Haymarket <col_header> Theatre </col_header> </cell> </table>
In 2004, Hannigan made her debut, starring in "When Harry Met Sally", at the Theatre Royal Haymarket.