Kaley Cuoco is truly America's sweetheart!
The actress rose to fame for her role as Bridget Hennessy on hit ABC sitcom "8 Simple Rules" between 2002 to 2005. Since 2007, she's starred as Penny on CBS sitcom "The Big Bang Theory."
And while there's no denying that Cuoco has transformed as an actress through the years, the same can be said for her style.
Photos of the 31-year-old actress during her earlier years in Hollywood shows a much different Kaley, who often hit the red carpet in tummy-baring tops. She was also a fan of gowns in bold colors -- like aquamarine and bright yellow -- and wild prints.
As years passed, the blonde beauty toned it down with the color and transformed into one of the most stylish actresses in Hollywood. There's no denying that Kaley's go-to is princess gowns in pretty pastel and neutral hues. The nude Catherine Kidd ballgown she wore to the 2011 Golden Globes remains one of her most stunning looks ever.
But Kaley also isn't afraid to flash some skin on the red carpet as well. She has show up to a handful of events in wearing cutout ensembles or dresses with plunging necklines. The star looked absolutely stunning at the 22nd Annual SAG Awards in a black gown with sexy cutouts.
Check out the slideshow above for Kaley Cuoco's complete style transformation.