Buffy Summers, played by Sarah Michelle Gellar, was vampires' worst nightmare in the beloved TV series "Buffy the Vampire Slayer."
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Marvel
Brie Larson is set to star as Carol Danvers / Captain Marvel in the forthcoming "Captain Marvel" film due in theaters in 2019. She will join a group of kick ass women in superhero and sci-fi films which include....
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Clay Enos/Warner Bros.
Gal Gadot's Wonder Woman first made an appearance in the 2016 film "Batman v Superman: Dawn of Justice." Her 2017 solo movie broke a box-office record for most money made by a film directed by a woman on its opening weekend.
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Focus Features
Charlize Theron kicked butt and looked fabulous while doing it as an undercover MI6 agent in "Atomic Blonde." She was strong, smart and beyond fierce in the role.
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Lucasfilm
Daisy Ridley portrays Rey, a young scavenger on the desert planet of Jakku in "Star Wars: Episode VII - The Force Awakens."
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CBS
Former "Glee" star Melissa Benoist (also seen in the Oscar-nominated "Whiplash") plays Supergirl in the CBS series of the same name.
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Lucasfilm Ltd
Blasting her way out of the Death Star, we knew fairly quickly that Leia was not one to be trifled with in the "Star Wars" films. Carrie Fisher played the role.
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Myles Aronowitz/Netflix/marvel
Krysten Ritter stars as "Jessica Jones" in the Netflix series based on Marvel Comics' "Alias," about a semi-retired superhero-turned-private eye.
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Lionsgate Films
Jennifer Lawrence is back as archer and freedom fighter Katniss Everdeen in "The Hunger Games: Mockingjay, Part 1" and coming soon, the final film, "Part 2."
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Marvel/Twentieth Century Fox
Zoe Saldana stars in not one but three major sci-fi movie franchises. She's Lt. Nyota Uhura in the rebooted "Star Trek" movies, stars as former assassin Gamora in the Marvel hit "Guardians of the Galaxy" and is Neytiri in "Avatar" and its planned sequels.
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CBS/Paramount Television/getty images
Nichelle Nichols played Lt. Uhura, the communications officer on the Starship Enterprise, in the original "Star Trek" TV series and films. In the recent movie reboots, her role was played by Zoe Saldana.
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Warner Bros.
Margot Robbie portrayed Batman villain (and the Joker's paramour) Harley Quinn in the eagerly awaited film "Suicide Squad."
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Kelsey McNeal/abc
Set in the post-World War II years, the new series "Marvel's Agent Carter" follows the continuing adventures of Peggy Carter, after the presumed death of her boyfriend Steve Rogers (a.k.a. Captain America).
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Marvel Studios
Scarlett Johansson stole the movie in her first scene in "The Avengers" -- not an easy thing to do. Black Widow was pretty kickass in the film.
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Courtesy Universal Pictures
"Lucy" seems to have boosted Johansson's action movie cred. The actress is reportedly starring in the live-action remake of "Ghost In The Shell."
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YouTube/ Renaissance Pictures
Lucy Lawless found fame on TV as the force of nature that was "Xena, Warrior Princess."
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From Twentieth Century Fox
Sigourney Weaver faced off with aliens not once, but four times in the "Alien" films and became the very model of the modern sci-fi heroine.
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TriStar Pictures/Lightstorm Entertainmen
Linda Hamilton (pictured) was the best known Sarah, but Emilia Clarke took on the Terminator in the 2015 reboot.
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Warner Bros.
Carrie-Anne Moss' Trinity was the first main character we saw in the "Matrix" and immediately, we were hooked.
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Steve Wilkie for BBC America
Tatiana Maslany's "clone club" brings new meaning to the term "girl power" on the critically-acclaimed BBC America series "Orphan Black." Maslany plays Sarah Manning on the show.
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20th Century Fox /Everett Collection
She may not have "wanted to believe" like her partner Fox Mulder, but Gillian Anderson as Scully on "The X-Files" was one of the best sci-fi characters of the past 20 years.
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From Warner Bros.
It's hard to choose a favorite Lois as there's been so many over the years, but we'll go with Margot Kidder's tough as nails reporter from the Christopher Reeve "Superman" movie series.
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From Sci-Fi Channel
They switched genders on us with this character in the 2000s reboot, and casting Katee Sackhoff as Starbuck in "Battlestar Galactica" was a stroke of genius.
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Frank Ockenfels/AMC
We didn't even see her face but when she used her katana to slice through zombies at the end of season two, we knew we really liked Michonne, actress Danai Gurira, from "The Walking Dead" right away.
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Jaap Buitendijk/WARNER BROS.
Emma Watson's Hermione Granger in the "Harry Potter" movies always knew just the right spell to get out of any situation.
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Warner Bros.
We'd rather not remember Halle Berry's take on the seductive thief, Catwoman, but Julie Newmar, Eartha Kitt, Lee Meriwether and Anne Hathaway were all splendid in the role. But for our money, Michelle Pfeiffer (pictured) in "Batman Returns" is the Catwoman to beat.
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Twentieth Century Fox
Leela, the pilot of the Planet Express ship, often acts as the voice of reason between Fry, Professor Farnsworth and the others in her crew on "Futurama." Katey Sagal is the voice of Leela.
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Macall B. Polay/HBO
Emilia Clarke's Daenerys Targaryen from "Game of Thrones" is so tough that she will literally walk through fire.
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From Universal Pictures
Mal trusts no one more than his right-hand woman Zoe, played by Gina Torres, in the beloved, short-lived series "Firefly."
Story highlights
Jennifer Lawrence did her final San Diego Comic-Con panel for the "Hunger Games" saga
She spoke about saying goodbye to the character of Katniss
CNN
—
One day into San Diego Comic-Con, and as one might expect, Jennifer Lawrence conquered it all.
Between posing with con newbie Bill Murray and photobombing Conan O’Brien, the superstar actress was everywhere in San Diego on Thursday.
At a panel that was raucous at times, the star of the upcoming final chapter of the “Hunger Games” saga, “Mockingjay Part 2,” Lawrence was asked about saying goodbye to her most iconic character, Katniss.
“I don’t feel like it’s happened yet,” she said, according to Hitfix.
“It’s still such a big part of my life. These movies really did change my life. The people who are in my life … you guys challenged me. I love you. I think that the changes that happened in my life are so permanent that I don’t think I’ll ever really say goodbye to her. She feels like she’s part of me.”
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Laura Sirikul/Facebook
San Diego Comic-Con is a great place to meet your favorite celebrities and this year's event was no different. Laura Sirikul ran into "The Walking Dead" fan favorite Norman Reedus.
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Aaron Sagers/Twitter
Aaron Sagers finished an interview with Peter Capaldi, star of "Doctor Who" and got this photo.
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Alexander Hernandez/Instagram
One of the most elusive celebrities, Bill Murray, stole the show in the opening hours of the convention, and Alexander Hernandez was able to grab a second with him on camera.
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Laura Sirikul/Facebook
Laura Sirikul happened to catch Wolverine himself, Hugh Jackman in the elevator on the way to his first panel Saturday morning for the upcoming movie "Pan."
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Emma Loggins/Twitter
Grant Gustin (center) is quite fast but Emma Loggins was able to get a photo with the actor who portrays TV's "The Flash."
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Alexander Hernandez/Instagram
Conan O'Brien is spending all of Comic-Con taping his show, and Alexander Hernandez ran across him early during the convention.
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Eliot Sirota/Twitter
It's rare for celebrities to brave the crowds on the convention floor, but John Boyega (left) and Daisy Ridley did just that. The stars of "Star Wars: The Force Awakens" got this selfie with hardcore fan Eliot Sirota.
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Sam Sobrevinas/Instagram
Yet another Doctor! Matt Smith was somewhat incognito but Sam Sobrevinas spotted him and got a quick photo.
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Chris Morrow/Twitter
Giving Ellen DeGeneres a run for her money, Chris Morrow snapped this photo with the entire cast for the CW's "iZombie."
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Alexander Hernandez/Instagram
Katharine McPhee, currently on CBS' "Scorpion," met Alexander Hernandez as well.
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Anna Ven Sobrevinas/Twitter
Steven Moffat is the man behind fan favorite series "Doctor Who" and "Sherlock" and shared a moment with Anna ven Sobrevinas (left) and sister Sam.
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Laura Sirikul/Facebook
Between "Doctor Who," "Torchwood" and "Arrow," John Barrowman is Comic-Con royalty, so Laura Sirikul made a point to get a photo with him.
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Zennie Abraham/Twitter
Speaking of Comic-Con royalty, Zennie Abraham got a selfie with Joss Whedon, director of "The Avengers" movies and creator of "Buffy" and "Firefly."
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Emma Loggins/Twitter
Kunal Nayyar moderated a panel for his hit series "The Big Bang Theory" and later paused for a photo with Emma Loggins (left).
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Chris Morrow/Twitter
The "Sharknado" sequels have no end in sight, so Tara Reid returned to Comic-Con, where she took a selfie with Chris Morrow.
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Alexander Hernandez/Instagram
T.J. Miller, fresh off the success of "Silicon Valley" and "Big Hero 6," is clearly excited for his next movie, "Deadpool."
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Laura Sirikul/Facebook
Not only the Doctor, but his companion Clara (aka Jenna Coleman) attended the convention as well.
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Amelia Caroline/Instagram
Chris Hardwick, the host of "Talking Dead" and "@Midnight," is ubiquitous at Comic-Con and took this selfie with Amelia Caroline.
Photos: Comic-Con: Selfies with celebrities
Shannon Martelli/Instagram
Shannon Martelli took this evening selfie with "Sleepy Hollow" and "Mad TV" star Orlando Jones.
Photos: Comic-Con: Selfies with celebrities
Alexander Hernandez/Instagram
January Jones took a moment from the "Last Man on Earth" autograph signing to pose here.
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Laura Sirikul/Facebook
Hugh Dancy's fan cred has gone up since starring on NBC's "Hannibal."
The panel also introduced a new teaser trailer for the final film, out on November 20.
