Words about Extreme Happiness

Delirious---wild with excitement, enthusiasm
She was delirious with joy when her daughter gave birth in front of her.

Euphoric--- intensely happy
She was euphoric when she was given the biggest part in the school play.

Ecstatic--- an intensely positive feeling
She was ecstatic when her boyfriend asked her to marry her.

Jubilant--- showing great joy, satisfaction, or triumph
Usain Bolt was jubilant after winning the 100 meters race in the Olympics.

Elated---very happy or proud
She was elated when she learned that she was pregnant.