The actress, who plays Penny in the sitcom, was seen with her arms around Ryan as they enjoyed a Memorial Day beach party together in Malibu on Monday (26 May).
Posting a photo of the moment to Instagram, she simply said: "My bae."
Kaley and Ryan looked utterly chilled out as they lounged on the beach in the shade, both distracted by their mobile phones. If you look closely enough, we think that's a snap from their wedding on Kaley's phone cover.
The blonde star married tennis play Ryan on New Year's Eve following a whirlwind romance. After meeting via mutual friends, Ryan moved into Kaley's LA home. They were engaged three months after their first date and married three months after that.
Kaley has spoken often about how their marriage shouldn't work on paper and her realisation people might think it all went too quickly, but has said they are soul mates and just knew they were right for each other.
The couple's romantic beach outing came the day before Kaley learned that Big Bang Theory had been nominated five times at the Critics' Choice Awards.
Kaley has been nominated for her acting, as have co-stars Mayim Bialik (Amy) and Jim Parsons (Sheldon), while the series has been named in the overall comedy category. Other nods include 'Best Guest Performer' for James Earl Jones.
Last year, Kaley won her category.
Recalling that moment via Instagram yesterday, she said: "This happened last year at #criticschoiceawards. thank u critics for another nod! I'm so honoured! #oneofmyfavoritemoments"
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