very happy because something good has happened► delighted · When she saw the new car, she was delighted.delighted about · His parents were absolutely delighted about the baby.delighted at · Andrea was delighted at the chance to go to the Bolshoi ballet.delighted to hear/see/learn/be etc · I was delighted to hear you were getting married.delighted (that) · We are delighted that the negotiations have been completed successfully.
► thrilled very happy and excited about something that has happened: · You should go for a visit - my parents would be thrilled.thrilled with: · Louise is thrilled with the changes she has seen in her son's behavior.thrilled at/by: · She was thrilled at the possibility of being sent to Europe.thrilled (that): · My mother's thrilled that the new house is so close to the park.thrilled to do something: · She was thrilled to have her picture taken with Mel Gibson.thrilled to bits (=very thrilled): · We were thrilled to bits when our daughter appeared on TV.
► be (sitting) on top of the world to feel extremely happy and confident because you are very successful or because something very good has happened to you: · Since the baby came Anna's been on top of the world.· After Mark got the promotion, he was sitting on top of the world.
► be over the moon British informal to be very happy about something good that has happened, especially something that makes you proud of yourself: · "How does it feel to have scored the winning goal?" "Over the moon, Brian."· When she discovered she'd got the job she was over the moon.
► overjoyed written very happy about something, especially a piece of good news: · Naturally I was overjoyed when I was offered the part in the play.overjoyed to see/hear/learn/be etc: · My parents were overjoyed to see my brother again.
► ecstatic extremely happy and excited about something: · The kids were ecstatic when we brought home the new video game system.ecstatic about/over: · Coggan said his clients were ecstatic about the judge's ruling.
► jubilant use this about a crowd of people who are very happy about something, for example because they have won something: · The jubilant fans lifted the players up on their shoulders.
► elated written very happy and excited for a short time, especially because you have achieved something that is important to you: · When I told her the news I thought she'd be elated.elated by/at/with: · Jeremy felt elated by this sudden and unexpected success.· Elated with the election victory, the crowd waved banners and chanted.
► joyful a group of people that are joyful are extremely happy, especially because they are celebrating a happy event - used especially in literature: · The streets of the city were filled with joyful crowds celebrating the New Year.· After their election victory, party members seemed positively joyful.
► radiant looking extremely happy: · He was radiant with excitement when he came off the stage.· She announced, with a radiant smile, that she was going to have a baby.
extremely happy and pleased because of a success: 
Radicals were jubilant at getting rid of him.