Actress Kaley Cuoco is dating equestrian Karl Cook. Picture: Supplied

The Big Bang Theory star, 30, has been dating Karl Cook, 26, since about March, following her split from husband Ryan Sweeting in September 2015.

Kaley Cuoco and Ryan Sweeting at the Emmys. Picture: InstagramSource:Supplied

Kaley Cuoco and boyfriend Karl Cook make their red carpet debut. Picture: SplashSource:Supplied

Cuoco married Sweeting in December 2013 after just six months of dating. But it is reported that the tennis pro’s addiction to pain killers caused an end to the marriage.

“You know, last year was very bizarre and we all go through really weird ups and downs,” she told Ellen DeGeneres in February. “I already feel like 2016 is going to be a much better year than 2015. And you know, it’s been rough, but things are going good. I’m much, much better now. I’m in a much better place than I was.”

The Big Bang Theory's leading lady Kaley Cuoco is moving on after her failed marriage to Ryan Sweeting. Picture: InstagramSource:Supplied

Cook is a professional equestrian and has appeared in many pictures with Cuoco on her Instagram page.

His dad, Scoot Cook, is a businessman with an estimated wealth of $2.6 billion.

Kaley Cuoco and equestrian Karl Cook watch the BNP Paribas Open in March. Picture: SuppliedSource:Getty Images

Kaley Cuoco and her ex-boyfriend, good friend and co-star Johnny Galecki. Picture: InstagramSource:Supplied

Not that Cuoco needs the money. She made $US24.5 million last year for her role as Penny in The Big Bang Theory, making her the second highest-paid actress on TV, behind Modern Family’s Sofia Vergara.

Kaley Cuoco with her Big Bang Theory co-stars. Picture: InstagramSource:Supplied

Cuoco and her co-stars Jim Parsons and Johnny Galecki earn $US1 million per episode for their work on the sitcom.

Cuoco is still very close with Galecki, who she secretly dated for two years, and had to reject suggestions that they were back together after her split from Sweeting.