 Peters first appeared in the NBC series Smash in the March 2012 episode " The Workshop " , as Leigh Conroy , Ivy 's mother , a retired Broadway star , who feels competitive because of her daughter 's blossoming career . She visits the workshop and sings Everything 's Coming Up Roses ( from Gypsy ) at the urging of the workshop cast . She also appeared in the season 1 finale , " Bombshell " ( May 2012 ) , to celebrate Ivy 's presumed role as Marilyn , in " The Parents " episode ( April 2013 ) , where , as Leigh , she sings an original Marc Shaiman and Scott Wittman song , " Hang the Moon " , and in the episodes " Opening Night " ( April 2013 ) and " The Phenomenon " ( May 2013 ) . 
