Question: What franchise did both R2-D2 and Luke Skywalker appear in?

Context paragraphs:
John Stears: John Stears (25 August 1934 – 28 June 1999) was a British two-time Academy Award-winning special effects expert.  Affectionately known as 'The Real Q' he created James Bond's lethal Aston Martin DB5, Luke Skywalker's Landspeeder, the Jedi Knights' lightsabers, the endearing robots R2-D2 and C-3PO as well as a host of other movie gadgets and special effects.  He also loves to play cricket.

Star Wars (2015 comic book): Star Wars is an ongoing "Star Wars" comic series published by Marvel Comics since January 14, 2015.  Written by Jason Aaron with art by John Cassaday, it is set between the 1977 film "Star Wars" and its 1980 sequel, "The Empire Strikes Back".  The series features classic "Star Wars" characters Luke Skywalker, Princess Leia, Han Solo, Chewbacca, C-3PO, and R2-D2.  It was one of three new "Star Wars" comics by Marvel announced in July 2014, along with "" and the limited series "".

Mara Jade: Mara Jade Skywalker is a fictional character in "Star Wars" expanded universe books, comic books, and computer games.  She is the wife of Luke Skywalker and mother of Ben Skywalker.  In the different video games, she is voiced by Heidi Shannon, Edie Mirman and Kath Soucie.

Padmé Amidala: Padmé Amidala (born Padmé Naberrie) is a fictional character in the "Star Wars" franchise, appearing in the prequel trilogy portrayed by actress Natalie Portman.  She served as the Princess of Theed and later Queen of Naboo.  After her reign, she became a senator in the Galactic Senate, an anti-war movement spokesperson, and co-founder of the opposition-faction that later emerged as the Rebel Alliance.  She was secretly married to the Jedi Anakin Skywalker, and the biological mother of Luke Skywalker and Leia Organa, which makes her the mother-in-law of Han Solo, and the grandmother of Kylo Ren.

R2-D2: R2-D2 is a fictional robot character in the "Star Wars" franchise created by George Lucas, who appears in the original trilogy, the prequel trilogy, the sequel trilogy, and Rogue One.  A small astromech droid, R2-D2 is a major character and appears in all "Star Wars" films to date.  Throughout the course of the films, he joins or supports Padmé Amidala, Anakin Skywalker, Leia Organa, Luke Skywalker, and Obi-Wan Kenobi in various points in the saga.

Luke Skywalker: Luke Skywalker is a fictional character and the main protagonist of the original film trilogy of the "Star Wars" franchise created by George Lucas.  The character, portrayed by Mark Hamill, is an important figure in the Rebel Alliance's struggle against the Galactic Empire.  He is the twin brother of Rebellion leader Princess Leia Organa of Alderaan, a friend and brother-in-law of smuggler Han Solo, an apprentice to Jedi Masters Obi-Wan "Ben" Kenobi and Yoda, the son of fallen Jedi Anakin Skywalker (Darth Vader) and Queen of Naboo/Republic Senator Padmé Amidala and maternal uncle of Kylo Ren / Ben Solo.  The now non-canon "Star Wars" expanded universe depicts him as a powerful Jedi Master, husband of Mara Jade, the father of Ben Skywalker and maternal uncle of Jaina, Jacen and Anakin Solo.

Star Wars (1977 comic book): Star Wars is a comic book series published by Marvel Comics from April 12, 1977 to May 27, 1986.  Featuring classic "Star Wars" characters Luke Skywalker, Princess Leia, Han Solo, Chewbacca, C-3PO, and R2-D2, the first six issues adapt the May 1977 film "Star Wars".  The series chronicled their subsequent adventures for 107 issues and three annuals, including a six-issue adaptation of the 1980 sequel film "The Empire Strikes Back" in 1980–1981.  The "Star Wars" comic was originally written by Roy Thomas with art by Howard Chaykin.

Cultural impact of Star Wars: George Lucas' science fiction multi-film "Star Wars" saga has had a significant impact on modern popular culture.  "Star Wars" references are deeply embedded in popular culture; references to the main characters and themes of "Star Wars" are casually made in many English-speaking countries with the assumption that others will understand the reference.  Darth Vader has become an iconic villain, while characters such as Luke Skywalker, Princess Leia, Han Solo, Chewbacca, R2-D2, and C-3PO have all become widely recognised characters around the world.  Phrases like "evil empire", "May the Force be with you", and most famously "I am your father" have become part of the popular lexicon.  The first "Star Wars" film in 1977 was a cultural unifier, enjoyed by a wide spectrum of people.

C-3PO: C-3PO ( ) or See-Threepio is a humanoid robot character from the "Star Wars" franchise who appears in the original trilogy, the prequel trilogy and the sequel trilogy.  Built by Anakin Skywalker, C-3PO was designed as a protocol droid intended to assist in etiquette, customs, and translation, boasting that he is "fluent in over six million forms of communication".  Along with his astromech droid counterpart and friend R2-D2, C-3PO provides comic relief within the narrative structure of the films, and serves as a foil.  Anthony Daniels has portrayed the character in all nine "Star Wars" cinematic films released to date, including "" and the animated ""; C-3PO and R2-D2 are the only characters to appear in every film.

Jacen Solo: Jacen Solo is a fictional character in the "Star Wars" expanded universe.  The son of Han Solo and Leia Organa Solo and the nephew of Luke Skywalker, he is a major character in several "Star Wars" novels, particularly the "New Jedi Order" series.  He becomes the antagonist of the "Legacy of the Force" series, later known as Darth Caedus.  He is the brother of Anakin Solo and Jaina Solo, grandson of Anakin Skywalker, and cousin of Ben Skywalker.

Supporting paragraphs: R2-D2 Padmé Amidala
Answer: Star Wars