Kaley Cuoco vacations with Karl Cook, his family in Australia

Aug. 4 (UPI) -- Kaley Cuoco returned this week from a vacation to Australia with boyfriend Karl Cook and his family.

The 31-year-old actress shared a series of photos Wednesday with Cook, a 26-year-old equestrian, and his parents and sister from their getaway Down Under.

The pictures show Cuoco and Cook wearing colorful boas at a bar, sitting down to dinner with Cook's parents and posing with Cook's parents and his sister, Annie Laurie Cook. The group arrived in Australia last week.

"We didn't have any fun at all on this trip," Cuoco captioned the slideshow for her 3.2 million Instagram followers.

"Thank you Cook family for another trip of a lifetime ... and thank you @mrtankcook for being you," she added with a heart emoji.

Cuoco and Cook were first linked in spring 2016 following the actress' split from husband Ryan Sweeting. Cook couldn't help but gush about Cuoco after reuniting with the star and their dog Ruby in March.

"Finally back together after the longest week after," he wrote. "I love you so much honey. You know what ruby, we love you too, you just love laying and wiggling right in the middle of us."

Cuoco plays Penny on the CBS sitcom The Big Bang Theory, which will return for an 11th season Sept. 25. Series creator Chuck Lorre said at TCA summer press tour this week that the show could "easily" end after Season 12.