Kaley Cuoco and Ryan Sweeting couldn't make it last ... The Big Bang Theory actress announced she and her hubby of 21 months will divorce, in a statement to People:

    "Kaley Cuoco and Ryan Sweeting have mutually decided to end their marriage. They ask for privacy at this time. No further statement will be issued regarding this matter."

Cuoco, 29, and the tennis player, 28, wed Dec. 31, 2013 after a whirlwind romance. Kaley has since deleted all Instagrams with her former hubby.

As she's losing a husband, however, Kaley's taking on a new pet! She posted this pic of her new horse, Zaza, on Saturday. Something else significant about the pic? No ring! Cuoco ditched her diamond wedding ring just a day after announcing her split.