Luke Skywalker-Mark Hamill
Princess Leia-Carrie Fisher
Han Solo-Harrison Ford
Darth Vader (Costume)-David Prowse
Darth Vader (Voice)-James Earl Jones
Obi-Wan Kenobi-Sir Alec Guinness
C-3PO-Anthony Daniels
R2-D2-Kenny Baker
Grand Moff Tarkin-Peter Cushing
Emperor Palpatine-Ian McDarmid
That's the main characters from Episode IV: A New Hope.
Hope that helps.
Here is a question which refers to cast members appearing only in the INITIAL release of the Star Wars movie episodes...
When it comes to great movie-watching-psychology, perhaps no other film ranks better than the six-part Star Wars saga, and asking if any of the ORIGINAL Star Wars cast members are still alive is a very good question for the following reason. There exists an element of confusion regarding the actual dates and titles of Star Wars films.
For example, the "original" movie was released in year 1977, under the actual title of "Star Wars." However, this very same film also bears the name, "Episode IV." Nonetheless, such intentional variations are part of what makes seeing great movies such a unique personal experience.
Now, the above query refers to the original or first episode "literally" released in the Star Wars movie series. In answering this question more directly, almost all members of the ENTIRE Star Wars cast are currently alive and well.
Only two members of the complete, long-term Star Wars cast are currently deceased. The names are Alec Guiness, who played the role of "Ben Obi-Wan Kenobi" in Episodes number four, five, and six. Alec Guiness died in year 2000.
The other deceased original Star Wars cast member is Peter Cushing, who played the role of "Grand Moff Tarkin" in Episode number four only. Peter Cushing died in year 1994.
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The Star Wars cast members are Mark Hamil who is Luke Skywalker, Harrison Ford who is Han Solo, Carrie Ffisher who is Princess Leia, Peter Cushing is Grand Moff Tarkin, Alex Guinness who is Obi-Wan Kenobi, David Prowse as the voice of Darth Vader, Anthony Daniels as C-3PO, Kenny Baker as R2-D2, Peter Mayhew as Chewbeccca, Phil Brown as Owen, Shelagh Fraser as Beru, Jack Purvis as Chief Jawa, Eddie Byrne as Vanden Willard who was a rebel General, Denis Wilson who is Wedge Antilles, Garrick Hagon who is Biggs Darklighter, Don Henderson as Cassio Tagge and Leslie Schofield as Moradmin Bast.
No all of the full house main cast is alive
No, the original cast are still alive
The cast members of the NBC television show "Sanford and Son" that are still alive as of July 2016 are Demond Wilson, Lynn Hamilton, Raymond Allen, Eric Laneuville, Gregory Sierra, Howard Platt, Marlene Clark and Migdia Chinea-Varela and Migdia Chinea-Varela is also sometimes credited in productions as the name; Migdia Chinea.
ALIVE
As far as I know, Madeline LeBeau (Yvonne), born in 1923, is the last survivor if the 1942 classic.
The Stars of 'Star Wars' Interviews from the Cast - 1999 V is rated/received certificates of: UK:E
The cast of Star Wars Pinball - 2013 includes: Ashley Eckstein as Ahsoka Tano
The cast of Star Wars in Japan Celebration - 2008 includes: Blair Butler as herself
The cast of Star Wars Gangsta Rap - 2000 includes: Jason Brannon as All Voices
The cast of Star Wars Arcade - 1996 includes: Gina Brandstetter as Animator Mike Chung as Animator
According to IMDb 71 people are in the credited cast.
The cast of Star Wars Tech - 2007 includes: Todd Barber as Himself - Propulsion Engineer, NASA-JPL
Your question doesn't make any sense.
Handed out the script and people tried out
The cast of Angry Birds Star Wars Cinematic Trailer - 2012 includes: Tom Kenny
No all of the full house main cast is alive
If you are talking about a person who starred in the Star Wars movies, you are talking about Pernilla August, who played Shmi Skywalker in Episodes 1 and 2