Prayer Pose

This is a stock pose. Males can be found doing it, but it's especially common among females, particularly within promotional material. The hands are clasped or the palms meet each other (this is a variation with the same emotional meanings) either in front of the chest or in front of the face. Light radiating from either the background or the hands is a common added touch. This is a gesture that generally indicates prayer of some kind, but not always. Sometimes, it's used more for its emotional value, in order to indicate someone who is pure of heart instead.

Contrast Clasp Your Hands If You Deceive.

Examples of Prayer Pose include:

Anime and Manga

Used creatively in Fullmetal Alchemist. Edward Elric's transmutations involve clapping his hands together. As pointed out by Rose in the Brotherhood anime, it looks much like prayer. Appropriate, considering the divine-like powers of alchemists, and Ed's struggles against evil.
FLCL episode 2 "Firestarter". After Canti the robot floats into the sky, he assumes a kneeling position with his hands clasped in prayer.
In Ranma ½, Ranma assumes this pose during the koi rod of love storyline and occasionally at other times such as when he prays at his ancestors grave.

Film

Metropolis, the first sequence in the underground cathedral, Frieder is kneeling with clasped hands and backlighting to create a halo effect.
Five Card Stud, a 1968 Western starring Dean Martin, Roddy McDowell and Robert Mitchum. A man cheats in a poker game and is caught and lynched by most of the other players; later on, the members of the lynch mob are murdered one by one, and a player who was out cold during the lynching (Martin) turns sleuth to avoid the same fate himself. One of the victims is found with his hands clasped in prayer, which is thought oddly uncharacteristic. The culprit was a preacher new to the area (played by Mitchum) who was secretly the brother of the murdered cheat, out to punish his brother's killers. By the way, Martin also sang the film's theme song.

Literature

When Richenda invokes the quarters (calls the archangels by name) for Nigel's empowering ritual in The King's Justice, she finishes by "bowing her head over hands joined palm-to-palm in an attitude of prayer". Light then washes out to finish Warding the ritual circle before Kelson begins his part.
Lampshaded in Deception Point, where the main character notes that the others might think she's doing this when they're left for dead on an ice flow but is actually preparing to tap out morse code since she knows that the organisation she works for has a listening post (although they're actually saved by a passing submarine that was investigating all the activity that lead to said stranding).

Live-Action TV

The final episode of Angel was advertised with a full page ad of David Borenanaz as Angel in this pose.

Music

Britney Spears did this in her Baby One More Time album cover.

Tabletop Games

Classic Traveller adventure Action Aboard - Adventures on the King Richard. Sister Mary Torget is a passenger aboard the starship ISSV King Richard. Her illustration shows her in nun's clothing and in this pose.

Video Games

Soul Calibur IV: often invoked by Sophitia in her victory poses, including one where she kneels and clasps her hands together, bowing her head, as she implores the gods for their divine protection.
Final Fantasy VII. When Aeris/Aerith is killed, she is kneeling with her hands clasped in prayer.
Subverted in Final Fantasy X. The prayer pose to the big religion, Yevon, is an elaborate version of the one described above. Thing is, it's actually a corruption of the prayer for Victory from a city destroyed a thousand years ago.

Western Animation

The Princess and the Frog: it's the standard "wishing on a star" pose. Both Tiana and Charlotte do it, while repeating "Please, please, please!"

Real Life

Buddhist Monks often walk with their hands in prayer position (it's called walking meditation). It's common for Kung Fu monks to fight their enemies with one arm while the other maintains the prayer position.
The Praying Mantis (insect) is called that because its forelimbs look like they're in a prayer pose.
Denver Broncos quarterback Tim Tebow adopts a kneeling pose with his head bowed and one hand in a fist near his face or forehead which has become known as Tebowing.