We may now have physical proof that Kaley Cuoco is dating billionaire heir Karl Cook.

Rumors have been circulating for much of March that the "Big Bang Theory" actress and her man are item. On March 31, Kaley seemed to confirm those, well, theories, in a sharing an Instagram photo of Karl kissing her adorably on the forehead.

"#tbt We absolutely mastered the ways of the #selfiestick," she captioned the two photo of herself cozying up to him on the beach. One image shows her leaning into him as he looks out over the Pacific Ocean. The other snap shows her smiling and looking at the camera while he plants a wet one on her.

#tbt We absolutely mastered the ways of the #selfiestick πŸ˜ŠπŸ•Άβ˜€οΈπŸŒŠ

A photo posted by @normancook on

These aren't the first photos to surface of the potential couple. The two certainly looked like an item at a tennis match in Indian Wells, California, on March 12, where Cuoco, 30, was snapped whispering and laughing with the 25-year-old Karl.

She has done little to curb rumors of the romance.

Earlier in the week she posted a snap of her shooting a gun while he licked her forehead. She used a heart emoji in the caption.

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A photo posted by @normancook on

Karl hails from Woodside, California, and is the son of billionaire businessman and co-founder of Intuit software, Scott Cook. He is an accomplished equestrian, so he and Kaley certainly share than common thread, as Kaley is also a horse lover.

Earlier this month, he took home the blue ribbon in the $25,000 SmartPak Grand Prix. After the win, she Instagrammed a picture of the two smiling while congratulating her beau.

"Sooo how many wins does that make??? Amazing GP win @hitshorseshows #thermal, Mr. KC so proud of you! (And entire team !)," she wrote.

A source told Entertainment Tonight that Karl has always been very focused on horseback riding, and that while he can be "quiet" at first, he definitely has a "goofy" side once he opens up.

The new probable romance follows the demise of her short-lived, 21-month marriage to tennis pro Ryan Sweeting last September.

Since that split, she has often been linked to her Big Bang Theory costar Johnny Galecki, but both of them have long denied any kind of romance. The blond cutie was also linked to "Arrow" star Paul Blackthorne in late 2015.