The more, the merrier

To say that we want as many people as possible to do something

You can use this phrase in ………… language.

 Spoken
Written
Formal
Informal

Example 1
Can I bring my wife to your party? Sure, the more the merrier.

Example 2
How many children shall we invite for Anna’s Barbie party?
Ten or fifteen – the more the merrier, I think.