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.