Actor : A person whose profession is acting on the stage, in films, or on television.
Acting : The art or occupation of performing fictional roles in plays, films, or television.
Comedian : An entertainer on stage or television whose act is designed to make an audience laugh.
Drama : A play for theatre, radio, or television • The activity of acting.
Entertainer : A person, such as a singer, dancer, or comedian, whose job is to entertain others.

Interesting links on acting :

• Ace your audition
• AADA
• Aaron Speiser
• ActingSchools
• Atlantic Theater Company
• Acting Career Start-Up
• Lee Strasberg
• Actors access (sm) – it’s all about control
• Auditioning for an Acting Role: What to Expect – For Dummies
• Central Casting
• Monologue Genie – The Monologue Genie
• My Hollywood Star
• ReelACT – America’s Largest Talent Video Directory
• The Groundlings