Veteran British actor Sir Ian McKellen has expressed that the last major professional achievement he would like to conquer is to star in a musical.

According to Deadline, speaking on a radio program, the 82-year-old legend of British theater, who was promoting his new detective play `Whodunnit (Unrehearsed)`, said he "doesn`t have much to prove anymore" but being in a musical is "one of the few areas left."