Master Thespian
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Master Thespian was a recurring character on American sketch comedy series Saturday Night Live. Played by Jon Lovitz, Master Thespian was a ruthlessly ambitious egomanaical actor who spoke with a plummy "Shakespearean" English accent and often elicited the sympathy of other characters in the sketch, only to reveal the ruse by declaring his catchphrase, "Acting!"
Lovitz's character in Subway Restaurants' 2006 advertisements bears an uncanny resemblance to Master Thespian. He is not addressed as such due to NBC owning the rights to the "Master Thespian" name.