Conversation so far:
What is Wallace Shawn famous for acting in?
His best-known film roles include Earl in Strange Invaders (1983) and Mr.
Hall in Clueless (1995).
Did he win any awards for his acting?
Shawn was honored in 2005 with the PEN/Laura Pels International Foundation for Theater Award as a Master American Dramatist.
What else did he star in?
Shawn quite often appears on television, where he has appeared in many genres and series.
Did he have a favorite role he played?
CANNOTANSWER.

Question: When did he begin acting?
Self-contained rewrite: When did Shawn begin acting?