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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A spiritual connection with the one you love is empowering. It feels wonderful to be with someone who shares your beliefs and values. Together, you can create a meaningful life. One of you may decide to break away from a conventional job for the sake of more rewarding work. The other will be in charge of creating financial stability. Be sure to express appreciation for each other's contributions. You make a great team. Best of all, you generate powerful chemistry.More