"We're engaged!" Cuoco excitedly announces through tears.
"You still haven't said yes yet," Cook jokes from behind the camera.
"Yes! I say yes! I say yes!" the newly-engaged actress yells as she laughs. Cuoco later shared the same clip, with the caption, "Still crying ? every part of this night has been perfection just like you @mrtankcook I love you forever!"
Cook also shared a photo of the impressive engagement ring, which features a large, pear-shaped center stone with smaller diamonds lining the band.
"I am so so so happy," he wrote in the caption. "Thank you @nadis_diamonds for making the greatest ring I could hope for. Absolutely brilliant. Thank you thank you."