Science fiction film is a film genre that uses science fiction: speculative, science-based depictions of phenomena that are not necessarily accepted by mainstream science, such as extraterrestrial life forms, alien worlds, extrasensory perception, and time travel, often along with futuristic elements such as spacecraft, robots, cyborgs, interstellar space travel or other technologies. Science fiction films have often been used to focus on political or social issues, and to explore philosophical issues like the human condition. In many cases, tropes derived from written science fiction may be used by filmmakers ignorant of or at best indifferent to the standards of scientific plausibility and plot logic to which written science fiction is traditionally held.

The genre has existed since the early years of silent cinema, when Georges Melies' A Trip to the Moon (1902) amazed audiences with its trick photography effects. The next major example in the genre was the 1927 film Metropolis. From the 1930s to the 1950s, the genre consisted mainly of low-budget B-movies. After Stanley Kubrick's 1968 landmark 2001: A Space Odyssey, the science fiction film genre was taken more seriously. In the late 1970s, big-budget science fiction films filled with special effects became popular with audiences after the success of Star Wars and paved the way for the blockbuster hits of subsequent decades.

Science fiction is a genre of fiction dealing with imaginary but more or less plausible (or at least non-supernatural) content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities. Exploring the consequences of scientific innovations is one purpose of science fiction, making it a "literature of ideas".

Science fiction is largely based on writing rationally about alternative possible worlds or futures. It is similar to, but differs from fantasy in that, within the context of the story, its imaginary elements are largely possible within scientifically established or scientifically postulated laws of nature (though some elements in a story might still be pure imaginative speculation).

The settings for science fiction are often contrary to known reality, but most science fiction relies on a considerable degree of suspension of disbelief, which is facilitated in the reader's mind by potential scientific explanations or solutions to various fictional elements. Science fiction elements include:

Mark Richard Hamill (born September 25, 1951) is an American actor, voice artist, producer, director, and writer, best known for his role as Luke Skywalker in the original Star Wars trilogy and voicing the Joker in various Batman media, including the DC Animated Universe. Hamill has also lent his voice to villains and anti-heroes.

Hamill was born in Oakland, California and raised in Virginia, the son of Virginia Suzanne (née Johnson) and William Thomas Hamill, who was a captain in the U.S. Navy. He was one of seven children: two brothers, Will and Patrick, and four sisters, Terry, Jan, Jeanie, and Kim. When Mark was a child, his father's career meant numerous relocations, and he attended different schools throughout his childhood. In his elementary years, he went to Poe Middle School. At age 11, he moved to the 5900 block of Castleton Drive in San Diego where he attended Hale Junior High School and then, during his freshman year at James Madison Senior High School, his family moved to Virginia. By junior year, his father was stationed in Japan where Mark attended Nile C. Kinnick H.S.(Yokosuka High) and was a member of the drama club. After that he attended Annandale High School in Annandale, Virginia. He majored in drama at Los Angeles City College.

John Christopher "Johnny" Depp II (born June 9, 1963) is an American actor, producer and musician. He has won the Golden Globe Award and Screen Actors Guild award for Best Actor. Depp rose to prominence on the 1980s television series 21 Jump Street, becoming a teen idol. Dissatisfied with that status, Depp turned to film for more challenging roles; he played the title character of Edward Scissorhands (1990) and later found box office success in films such as Sleepy Hollow (1999), Charlie and the Chocolate Factory (2005), Rango (2011) and the Pirates of the Caribbean film series (2003–present). He has collaborated with director and friend Tim Burton in eight films, most recently with Dark Shadows (2012).

Depp has gained acclaim for his portrayals of people such as Ed Wood, in Ed Wood, Joseph D. Pistone in Donnie Brasco, Hunter S. Thompson in Fear and Loathing in Las Vegas, George Jung in Blow, and the bank robber John Dillinger in Michael Mann's Public Enemies. Films featuring Depp have grossed over $3.1 billion at the United States box office and over $7.6 billion worldwide. He has been nominated for top awards many times, winning the Best Actor Awards from the Golden Globes for Sweeney Todd: The Demon Barber of Fleet Street and from the Screen Actors Guild for Pirates of the Caribbean: The Curse of the Black Pearl. He also has garnered a sex symbol status in American cinema, being twice named as the "Sexiest Man Alive" by People magazine in 2003 and 2009. He has been listed in the 2012 Guinness Book of World Records as the highest paid actor, with $75 million.