Kaley Cuoco Joins Boyfriend Karl Cook and His Family on Australian Vacation -- See the Cute Pics!

Photo: Instagram
Kaley Cuoco is clearly part of the family!
The Big Bang Theory star looked right at home while vacationing with her boyfriend, Karl Cook, and his family in Australia.
"We didn't have any fun at all on this trip," Cuoco captioned a slideshow of pics from their getaway. "Thank you Cook family for another trip of a lifetime ... and thank you @mrtankcook for being you ❤️."

See more snaps from the trip below.

ET caught up with Cuoco in April, who said that despite catching a little "baby fever" from her friends, she and Cook are currently staying busy with their many dogs. 
See more in the video below.