Kaley Cuoco Reflects on 'Best Birthday' Ever, Admits 'There Have Been a Few Bumps'

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Kaley Cuoco celebrated her 30th birthday on Monday, and the Big Bang Theory star took to Instagram to thank her friends, family and fans for their support and love on her special day.

"Today was the best birthday I have ever had ... Thank you for all the love and best wishes," Cuoco wrote in in the caption alongside of photo of herself looking out over the famous Teotihuacan pyramids in Mexico. "My heart is overwhelmed with joy and complete contentment."

WATCH: Kaley Cuoco Celebrates Her 30th Birthday With Her Sister, Furry Friends, and a 'Bachelorette' Star

The actress was joined on her adventure to Mexico by a dozen of her closest friends, including her younger sister Briana, who turned 27 on Sunday.

"Thank you to my precious little angels who accompanied me on this trip and gifted me with something so special," Cuoco shared.

In her post, Cuoco also admitted that there "have been a few bumps along the way" this past year -- likely referring to her split from husband Ryan Sweeting after 21 months of marriage -- but added that the hardships were "nothing I can't handle."

WATCH: Kaley Cuoco Gets Emotional While Addressing Her Difficult Year

The birthday girl seems excited to face whatever life has to offer her in the coming year, ending the photo caption with the hashtag "#30isgonnarock."

For a look at how Cuoco spent her big 3-0 this weekend -- including some epic tiger petting -- check out the video below.

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