Actor Taylor Lautner, who plays the werewolf Jacob in the "The Twilight Saga" movies beams at fans at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village and Bruin Theaters in Westwood, Calif., Nov. 16, 2009. If were part of a franchise this popular, you'd be grinning like these stars, too.
Actress Kristen Stewart, who stars as Bella Swan in the "Twilight Saga" movies, smiles on the red carpet at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village and Bruin Theaters in Westwood, Calif., Nov. 16, 2009.
British actor Robert Pattinson has a big grin for fans as the star who plays vampire Edward Cullen walks the red carpet at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village and Bruin Theaters in Westwood, Calif., Nov. 16, 2009.
Of course, the movie about the undead is considerably darker with little opportunity for smiles. Here's how actors Kristen Stewart, center, Robert Pattinson, left, and Taylor Lautner, right, look without grins in a scene from "The Twilight Saga: New Moon."
Actor Kellan Lutz, who plays Emmett Cullen, smiles as he takes photos with fans at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009.
Actress Dakota Fanning, who plays the Italian royal vampire Jane, flashes a smile on the red carpet at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village Theaters in Westwood, Calif., Nov. 16, 2009.
Ashley Greene plays Alice Culllen, the young vampire adopted into Edward's family. She found lots to smile about when she signed autographs at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009.
Castmates Actors Elizabeth Reaser and Peter Facinelli put their smiling heads together at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009. Facinelli plays the patriarch of the vampire family, Carlisle Cullen, and Reaser is Esme, his wife.
Justin Chon smiles at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village Theaters in Westwood, Calif., Nov. 16, 2009. He plays Eric, one of Bella's non-vampire suitors.
Nikki Reed has a big smile at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village Theaters in Westwood, Calif., Nov. 16, 2009. Despite her character's name, Rosalie Lillian Hale, she is a member of the Cullen vampire clan and is married to Emmett.
You may know him as on-screen Tony Blair and David Frost, but "Twilight" fans see actor Michael Sheen as Aro, the leader of the vampiric Volturi. He's got an extra reason to smile because he is at the Los Angeles premiere of "The Twilight Saga: New Moon" with his daughter, Lily.
Author Stephanie Meyer arrives at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009. She wrote a wildly popular series of young adult books that was turned into the wildly popular "Twilight Saga" movies.
Daniel Cudmore attends the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village Theaters in Westwood, Calif., Nov. 16, 2009. Cudmore plays Felix, a member of the Volturi guard.
Charlie Bewley, who plays the tracker Demetri, a a member of the Volturi guard, has a smile for the cameras as he arrives at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009.
Actress Kirsten Prout arrives at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009. She's not in this movie, but she still has a good reason to smile: She has a role in the next "Twilight" film just wrapping up production.
You don't have to be in the movie to smile; sometimes just being at the premiere can make you grin. Actress Emma Roberts arrives at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village Theaters in Westwood, Calif., Nov. 16, 2009.
Can "The Ghost Whisperer" speak to vampires? Jennifer Love Hewitt, star of the TV series, and her boyfriend, Jamie Kennedy, share a smile at "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009.
Actior Justin Chambers flashes a grin at the Los Angeles premiere of "The Twilight Saga: New Moon," held at Mann Village Theaters in Westwood, Calif., Nov. 16, 2009
Not only is Richie Sambora cool musician -- he's a cool dad, taking daughter Ava to "The Twilight Saga: New Moon" premiere in Westwood, Calif., Monday, Nov. 16, 2009. And that's reason to smile.
Enough with the crazy grins. When "The Twilight Saga: New Moon" opens Friday, there will be tears and sighs and sobs in theaters around the world. Advance ticket sales are on target to set a record. And that's why everyone is smiling.