In the adorable photo, Cuoco, 30, looks like she’s nuzzling the side of Cook’s face while placing one hand casually on his shoulder.
“That’s what happy looks like,” she captioned the picture, along with a heart emoji.
The Big Bang Theory star and Cook, 25, first started dating in early March, and the competitive rider began to make appearances on Cuoco’s social media accounts shortly afterward.
“They really like each other so far but it’s only been a month,” a source told Us of the budding relationship.
In December, Us Weekly exclusively revealed that the actress was dating Arrow’s Paul Blackthorne. The longtime pals’ romance fizzled earlier this year, however, leading to her new relationship with Cook. (She was also linked to her ex and Big Bang costar, Johnny Galecki, but Cuoco clarified that they were merely "very close.")
Cuoco was previously married to tennis pro Ryan Sweeting for 21 months; she filed for divorce last September.
In the April issue of Cosmopolitan, the actress revealed that though her ideas about marriage were shaken, she remained just as optimistic about finding a soulmate as ever before.
“It does not change the way that I look at love,” she said of her divorce. “I cannot wait to be in love again.”