Casey Becker is a fictional character from the Scream franchise, first appearing in the 1996 film Scream, as its false protagonist. The character was created by Kevin Williamson and originated by American actress Drew Barrymore. Casey was subsequently played by Heather Graham in Scream 2 for its movie-within-a-movie scenes. Casey and Steve Orth, her boyfriend, are the first characters to be killed on-screen in the franchise, in what has been called "one of the most famous scenes of all time."

Casey Becker first appears in Scream for the initial twelve minutes of the film. In 1997's Scream 2, the second installment of the Scream franchise, the character appears in a film-within-a-film titled Stab. Archival footage of Heather Graham as Casey in Stab from Scream 2 is reused in Scream 4 as part of the viewing at a theme party. The character Casey also appears briefly in Scream VI in a recreation of the first Stab movie made by character Richie Kirsch.

In October 2020, Barrymore unofficially revived the character for a short video skit titled What if Casey Becker from Scream Lived? on The Drew Barrymore Show in which she gets texts from the killer on her cell phone, but ignores him.

Screenwriter Kevin Williamson created the character when he started the script for Scream (1996). Initially, filmmakers did not think to cast a well-known actress for Casey's part, as the character dies in the opening of the film. Drew Barrymore was initially cast as lead character Sidney Prescott (eventually played by Neve Campbell), but opted to take the role of Casey instead to break the trope of high-profile actresses never dying in horror films. Barrymore stated:

"In the horror film genre, my biggest pet peeve was that I always knew the main character was going to be slugging through at the end, but was going to creak by and make it. What I wanted to do is to take that comfort zone away. I asked if I could be Casey Becker so we would establish this rule does not apply in this film."

Casey's scenes were shot over five days, independent from the rest of the movie. At first, Dimension Films studio did not appreciate the dailies of this scene and almost fired director Wes Craven until they saw the footage cut together and were impressed.

In the Japanese dubbed version of the film, voice actress Megumi Hayashibara dubs Barrymore's lines. In Scream 2 (1997), Casey is played by Heather Graham.

Casey Becker is a 17-year-old Woodsboro teenager and the former girlfriend of Stu Macher, a main character in Scream. After receiving a taunting and threatening phone call, she is ordered to answer horror film trivia questions to save the life of her 18-year-old boyfriend, football player Steve Orth (portrayed by actor Kevin Patrick Walls). When Casey answers incorrectly, Steve is disemboweled on her porch and she is asked another question to save her own life. When she refuses to answer, Ghostface chases her down and kills her, leaving her disemboweled and hanged from a tree, where she is discovered by her mother Mrs. Becker.