"Twilight's'" Leading Lady, Kristen Stewart, has just turned 22 years old yet it looks as if she hasn't aged a day.

Her onscreen and off-screen beau, Robert Pattinson, is indeed one lucky guy to be dating this all-American beauty. Take a look at how Kristen Stewarts's best red carpet looks evolved throughout the years.

Kristen Stewart is barely recognizable as the child who played Jodie Foster's teenage daughter in the film, "Panic Room". Before the 22-year old donned high heels and fashionable gowns, Kristen Stewart rocked the sneakers and jeans look for her red carpet appearances.

Now that she's the new face of Balenciaga, all that has changed. Stewart is seen half the time in chic and feminine clothes that definitely complement her gorgeous looks and her dazzling skin tone. Her airport looks comprise of ordinary Keds and tight-fitting jeans but once the "Twilight" actress steps onto the red carpet, she turns heads and captures hearts.

According to Hollywood Life, Kristen & Robert enjoyed a low-key date night with a few friends at the LA Bar, Harvard & Stone last April 7 where they had "lots of drinks on the top floor" and enjoyed a "burlesque show."

"It is a really small, very cool hidden spot so no one paid any mind to them or seemed to notice," shared the eyewitness. "I saw them as they came down to exit ... I was leaving at the same time. Rob was rounding the group up and Kristen went first with friends and Rob followed."

Her British boyfriend, Robert Pattinson, may have covered all the sweet and romantic details for Stewart's birthday but the birthday greetings from her co-stars in the film, "Snow White & the Huntsman" are incomparable.

Stewart's co-stars in the film, "Snow White & the Huntsman", Charlize Theron, Chris Hemsworth and Sam Clafin also took part in the birthday greetings where each posted a video birthday greeting for the one and only KStew.

In the words of Charlize Theron: "Keep Rockin" Kristen Stewart and wishing all the best for the fairest of them all. "Twi-hards" are surely creating one hell of a birthday greeting for one half of their "Robsten" addiction.

Actress Kristen Stewart attends the 2010 Vanity Fair Oscar party in West Hollywood, California March 7, 2010.

Actress Kristen Stewart poses for photographers as she arrives at the premiere of "The Runaways" in New York City March 17, 2010.

U.S. actress Kristen Stewart poses as she arrives for the red carpet to promote the movie "The Twilight Saga: Eclipse" in downtown Rome June 17, 2010.

U.S. actress Kristen Stewart poses during a photo call promoting her new movie "The Twilight Saga: Eclipse" in Berlin, June 18, 2010.

Actress Kristen Stewart attends her hand and footprint ceremony at the Grauman's Chinese Theatre in Hollywood, California November 3, 2011.

Cast member Kristen Stewart poses at the premiere of "The Twilight Saga: Breaking Dawn - Part 1" at Nokia Theatre in Los Angeles November 14, 2011. The movie opens in the U.S. on Friday.

"Twilight" film star Kristen Stewart arrives at the Teen Choice 2009 Awards taping in Los Angeles, California August 9, 2009.

Actress Kristen Stewart arrives at Nickelodeon's 25th annual Kids' Choice Awards in Los Angeles, California March 31, 2012. "Twilight" star Stewart, 21, was named favorite movie actress at the award.

Kristen Stewart from the film "Twilight" poses at the 2009 MTV Movie Awards in Los Angeles May 31, 2009

Actress Kristen Stewart arrives at the premiere of "Adventureland" at the Mann Chinese 6 Theater in Hollywood, California March 16, 2009.