Grammar fix
I'm over the moon
be thrilled
A warm, informal way to say you are extremely happy or excited about something good.
expressionB1common
Hear it in context
Notice where the phrase sounds natural.
I got the job — I'm over the moon!
A: They said yes — we got the flat!
B: That's amazing, I'm over the moon for you both!
Fix the pattern
One small grammar move makes it sound right.
Not: I'm over moon for the news.
Say: I'm over the moon about the news.
Keep the fixed phrase 'over the moon' with 'the', and use 'about' for the reason.