Carrie Fisher, photographed in December 2015, has died after suffering a heart attack on a flight from London to Los Angeles on Dec. 23, 2016, and being treated in a Los Angeles hospital for several days. Robert Deutsch, USA TODAY

The relationship between Princess Leia (Carrie Fisher) and Han Solo (Harrison Ford) evolved in "Star Wars Episode V: The Empire Strikes Back" Lucasfilm Ltd.

Debbie Reynolds, left, and daughter Carrie Fisher attend the 2011 Primetime Creative Arts Emmy Awards at Nokia Theatre on Sept. 10, 2011, in Los Angeles. Noel Vasquez, Getty Images

Princess Leia confronts Darth Vader in "Star Wars Episode IV: A New Hope." Lucasfilm Ltd.

Things got racy for Princess Leia (Carrie Fisher) in "Star Wars: Episode VI: Return of the Jedi." Lucasfilm Ltd.

Left to right: Harrison Ford, Carrie Fisher and Mark Hamill (and in back, Chewbacca) in a publicity photo from 1980's "Star Wars Episode V: The Empire Strikes Back" Lucasfilm Ltd.

From left, Mark Hamill, Carrie Fisher and Harrison Ford speak onstage during the 33rd AFI Life Achievement Award tribute to George Lucas at the Kodak Theatre on June 9, 2005, in Hollywood. File photo by Kevin Winter, Getty Images

Carrie Fisher promotes her memoirs, "Wishful Drinking," in New York on Dec. 9, 2008. File photo by Todd Plitt, USA TODAY

Carrie Fisher played Mia in the first season of the Amazon original comedy series "Catastrophe." Ed Miller, Amazon Studios

Carrie Fisher attends the opening ceremony and "Gravity" premiere during the 70th Venice International Film Festival at the Palazzo del Cinema on Aug. 28, 2013, in Venice. File photo by Ian Gavan, Getty Images

Billie Catherine Lourd, left, and Carrie Fisher arrive at the Governors Awards at the Dolby Ballroom on Nov. 14, 2015, in Los Angeles. Jordan Strauss, Invision, via AP

Anthony Daniels as C-3PO, Kenny Baker as R2D2, Mark Hamill as Luke Skywalker and Carrie Fisher as Princess Leia in "Star Wars: Episode V - The Empire Strikes Back" Lucasfilm

Carrie Fisher, from left, Mark Hamill, and Harrison Ford attend Lucasfilm's "Star Wars: The Force Awakens" panel on the second day of Comic-Con International on July 10, 2015, in San Diego. File photo by Richard Shotwell, Invision, via AP

Cast members of the original "Star Wars" film -- Mark Hamill, from left, Carrie Fisher and Anthony Daniels, who played C-3PO -- appear during the kickoff event of Disney's Star Wars Celebration 2015 at the Anaheim Convention Center on April 16, 2015, in Anaheim, Calif. Kevork Djansezian, Getty Images

Carrie Fisher as Princess Leia in "Star Wars: Episode IV - A New Hope" Lucasfilm Ltd.

From left, Anthony Daniels as C-3PO, Kenny Baker as R2D2, Mark Hamill as Luke Skywalker, Carrie Fisher as Princess Leia, Harrison Ford as Han Solo and Peter Mayhew as Chewbacca in "Star Wars: Episode IV - A New Hope" Lucasfilm Ltd.

Carrie Fisher as Princess Leia and Harrison Ford as Han Solo in "Star Wars: Episode V - The Empire Strikes Back' Lucasfilm Ltd.

Carrie Fisher, from left, Mark Hamill, and Harrison Ford attend Lucasfilm's "Star Wars: The Force Awakens" panel at Comic-Con International in San Diego on July 10, 2015. Richard Shotwell, Invision, via AP

From left, Peter Mayhew as Chewbacca, Carrie Fisher as Princess Leia and Harrison Ford as Han Solo in "Star Wars: Episode V - The Empire Strikes Back" Lucasfilm Ltd.

Carrie Fisher, left, and daughter Billie Lourd arrive at the world premiere of "Star Wars: The Force Awakens" at the TCL Chinese Theatre on Dec. 14, 2015, in Los Angeles. Jordan Strauss, Invision, via AP

Domhnall Gleeson and Carrie Fisher pose in the winners' room at the EE British Academy Film Awards at The Royal Opera House on Feb. 14, 2016, in London. Mike Marsland, WireImage

Carrie Fisher and Fisher Stevens attend a photo call for Bright Lights during the 69th annual Cannes Film Festival at the Palais des Festivals on May 15, 2016, in Cannes, France. Andreas Rentz, Getty Images

Tom Hiddleston and Carrie Fisher, with her dog, Gary, attend the 102nd White House Correspondents' Association Dinner on April 30, 2016, in Washington, D.C. Larry Busacca, Getty Images

Carrie Fisher and her French bulldog, Gary, attend the 54th New York Film Festival "Bright Lights" screening at Alice Tully Hall on Oct. 10, 2016, in New York City. Jim Spellman, WireImage

Carrie Fisher and Billie Catherine Lourd attend the "Absolutely Fabulous: The Movie" world premiere at the Odeon Leicester Square on June 29, 2016, in London. Gareth Cattermole, Getty Images

Carrie Fisher signs copies of her new book, "The Princess Diarist," at Barnes & Noble at The Grove on Nov. 28, 2016, in Los Angeles. Araya Diaz, WireImage

Carrie Fisher arrives for the European premiere of "Star Wars: The Force Awakens' at London's Leicester Square on Dec. 16, 2015. Facundo Arrizabalaga, European Pressphoto Agency

Carrie Fisher flatters a Stormtrooper at the European premiere of "Star Wars: The Force Awakens" in London on Dec. 16, 2015. Facundo Arrizabalaga, European Pressphoto Agency