Cuoco's representative, Melissa Kates, says the actress wed tennis pro Ryan Sweeting in a New Year's Eve ceremony at a ranch in Santa Susana, Calif.
Afterward, the 28-year-old Cuoco 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.
Cuoco previously dated her "Big Bang" co-star Johnny Galecki.