Her representative, Melissa Kates, said the actress married tennis pro Ryan Sweeting in a New Year's Eve ceremony at a ranch in Santa Susana, California.
Afterwards, the 28-year-old posted a few photos with her 26-year-old husband on her Instagram account.
She wore a pink Vera Wang wedding gown and captioned one picture as "Greatest night of my entire life".
The couple dated for three months before getting engaged in September.
Kaley had previously dated her Big Bang Theory co-star Johnny Galecki.
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Don't bring your work home with you. Although you're wonderfully efficient in your job, you require different skills when dealing with friends and family. Be generous with your praise, resources and encouragement. Someone who is struggling needs moral support. Giving a lecture about personal responsibility will not help. Instead, lend a sympathetic ear. Ask questions. Picture things from the other person's point of view. A receptive attitude will strengthen your relationship.More