How to share with my daughter she will be a big sister?

We have a 5 year old daughter who has been asking for a sibling since she said her first words! I’m soooo excited that I am now 5 weeks with our second. We have to wait of course to tell her until it’s safe since she would not be able to keep this secret:) Since it’s such a special time and will be life changing news I was wondering if anyone has ideas of how to share these news with her when the time comes? Anyone has stories to share? Thanks in advance!