05/02/2016 AT 08:15 PM EDT
isn't hiding her happiness.The Big Bang Theory
actress, 30, and her new beau, professional equestrian Karl Cook, were photographed kissing over a gas pump on Sunday.
"She's really happy," a source tells PEOPLE of the budding romance.
Karl Cook and Kaley Cuoco
The smooch is just the latest PDA between the two – over the past month, Cuoco has posted several Instagrams
showing the couple in various states of affection. From sweet selfies and playful shots to cuddling on the beach, the actress seems to be enjoying her new relationship following her split
last September from her husband of almost two years, Ryan Sweeting.
As for why they click, Cuoco and Cook, whose father Scott has a reported net worth of around $2 billion, obviously have bonded over their love of horses.
Kaley Cuoco and Karl Cook
Cook, 25, is a Grand Prix winner while the actress has enjoyed riding for years and has several horses of her own.