Watson ta fara aikinta a kan mataki kuma ta shiga Royal Shakespeare Company a shekarar 1992. A shekara ta 2002, ta taka rawa a cikin shirye-shiryen Twelfth Night da Uncle Vanya a Donmar Warehouse, kuma an ba ta lambar yabo ta Olivier Award a shekarar 2003 don 'yar wasan kwaikwayo mafi kyau.
a kan mataki