Question: Which role did this American actress, writer, and humorist who guest-starred in Rosemary's Baby play in the "Star Wars" films?

Context paragraphs:
Star Wars (film): Star Wars (later retitled Star Wars: Episode IV – A New Hope) is a 1977 American epic space opera film written and directed by George Lucas.  It is the first film in the original "Star Wars" trilogy, the first "Star Wars" movie in general, and the beginning of the "Star Wars" franchise.  Starring Mark Hamill, Harrison Ford, Carrie Fisher, Peter Cushing, Alec Guinness, David Prowse, James Earl Jones, Anthony Daniels, Kenny Baker, and Peter Mayhew, the film's plot focuses on the Rebel Alliance, led by Princess Leia (Fisher), and its attempt to destroy the Galactic Empire's space station, the Death Star.  This conflict disrupts the isolated life of farmhand Luke Skywalker (Hamill), who inadvertently acquires a pair of droids that possess stolen architectural plans for the Death Star.  When the Empire begins a destructive search for the missing droids, Skywalker accompanies Jedi Master Obi-Wan Kenobi (Guinness) on a mission to return the plans to the Rebel Alliance and rescue Leia from her imprisonment by the Empire.

Carrie Fisher: Carrie Frances Fisher (October 21, 1956 – December 27, 2016) was an American actress, writer, and humorist.  Fisher was known for playing Princess Leia in the "Star Wars" films; a role for which she was nominated for three Saturn Awards.  Her other film roles included "Shampoo" (1975), "The Blues Brothers" (1980), "Hannah and Her Sisters" (1986), "The 'Burbs" (1989), "When Harry Met Sally..." (1989), "Soapdish" (1991) and "The Women" (2008 film).  She was nominated twice for the Primetime Emmy Award for Outstanding Guest Actress in a Comedy Series for her performances on the television series "30 Rock" and "Catastrophe".  She was posthumously made a Disney Legend in 2017.

Star Wars: Clone Wars (2003 TV series): Star Wars: Clone Wars (sometimes referred to as Tartakovsky's Clone Wars) is an American science fiction animated microseries created, directed, produced and co-written by Genndy Tartakovsky, set in the "Star Wars" universe.  Produced and released between the films "" and "", it is the first of many works to explore the conflict set between the two known as the Clone Wars, and directly leads to the events of "Revenge of the Sith".  The show follows the actions of various characters from the "Star Wars" prequel trilogy, notably Jedi Knights and clone troopers, in their war against the battle droid armies of the Confederacy of Independent Systems and the Sith.  The series is notable for introducing the character of General Grievous to the "Star Wars" universe.

Wookieepedia: Wookieepedia: The "Star Wars" Wiki is an online encyclopedia for information on the "Star Wars" fictional universe—including information on all the films, as well as "Clone Wars", "" and its , "Rebels", the "Star Wars" expanded universe, and any upcoming "Star Wars" material.  It is a specialized wiki created to be an extensive encyclopedia of the "Star Wars" universe with some articles reaching up to 60,000 words, and is written almost entirely from an in-universe perspective.  The name Wookieepedia is a portmanteau of Wookiee and encyclopedia, a pun on the name of "Wikipedia".  The logo, too, is a visual pun showing the incomplete second Death Star as opposed to Wikipedia's incomplete "jigsaw logo".

Rosemary's Baby (30 Rock): "Rosemary's Baby" is the fourth episode of the second season of "30 Rock", and the twenty-fifth episode overall.  It was written by Jack Burditt and was directed by Michael Engler.  The episode first aired on October 25, 2007 on the NBC network in the United States.  Guest stars in this episode include Elijah Cook, Carrie Fisher, Marcella Roy, Paul Scheer, Megan Blake Stevenson, Jean Villepique and Stuart Zagnit.

Star Wars comics: "Star Wars" comics have been produced by various comic book publishers since the debut of the 1977 film "Star Wars".  An eponymous series by Marvel Comics began in 1977 with a six-issue comic adaptation of the film and ran for 107 issues, until 1986.  Blackthorne Publishing released a three-issue run of 3-D comics from 1987 to 1988.  Dark Horse published the limited series "" in 1991, and ultimately produced over 100 "Star Wars" titles until 2014, including manga adaptations of the original trilogy of films and the 1999 prequel "".  The Walt Disney Company acquired Marvel in 2009 and Lucasfilm and in 2012, and the "Star Wars" comics license returned to Marvel in 2015.  In 2017, IDW Publishing launched the anthology series "Star Wars Adventures".

Star Wars Trilogy Arcade: Star Wars Trilogy Arcade is an arcade game first released in 1998.  The game is a 3-D rail shooter based on the original trilogy of "Star Wars" films and was released along with the special editions of these films.  Accompanied by the "Star Wars Trilogy" pinball game, it is the second in Sega's "Star Wars Arcade" series; it is preceded by 1993's "Star Wars Arcade" and followed by 2000's "Star Wars Racer Arcade".

Lego Star Wars II: The Original Trilogy: Lego Star Wars II: The Original Trilogy is a Lego-themed action-adventure video game developed by Traveller's Tales and published by LucasArts and TT Games Publishing.  It was released on 11 September 2006.  Part of the "Lego Star Wars" series, it is based on the "Star Wars" science fiction media franchise and Lego Group's "Star Wars"-themed toy line.  It follows the events of the "Star Wars" films "Star Wars", "The Empire Strikes Back" and "Return of the Jedi".  The game allows players to assume the roles of over 50 Lego versions of characters from the film series; customized characters can also be created.  Camera movement was improved from its predecessor—""; and the concept of "vehicle levels" was explored more thoroughly.  The game was revealed at American International Toy Fair 2006.  Promotions for the game were set up at chain stores across the United States.

Journey to Star Wars: "Journey to "Star Wars" is a Disney/Lucasfilm publishing initiative that connects the "Star Wars" sequel films with previous film installments in the franchise.  It currently includes the initiatives "Journey to "Star Wars: The Force Awakens" and "Journey to "Star Wars: The Last Jedi"".  All titles under the program are canonical to the "Star Wars" universe.

Star Wars: Republic: Star Wars: Republic is an American comic book series set in the fictional "Star Wars" universe.  The series was published by Dark Horse Comics from 1998 to February 2006.  The series was originally titled simply "Star Wars", but acquired its "Republic" title at issue 46.  The entire series comprises 83 issues.  The "Star Wars: Republic" series is one of a number of comic book series set in the "Star Wars" expanded universe.

Supporting paragraphs: Rosemary's Baby (30 Rock) Carrie Fisher
Answer: Princess Leia