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.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? email@example.com
It's important to treat yourself well. Constantly deferring to others will deprive you of the finer things in life. Carve time out of your busy schedule to pamper yourself. Taking a nap, solitary walk or hot bath will revive your spirits. Get into the habit of spending more money on creature comforts. Treat such as gourmet food, beautiful clothes and intriguing books are investments in your happiness. Others may object at being put farther down on your list of priorities, but that's their problem.More