... And last but not the least

What are the meanings of this phrase. An example is
And last but not the least, famous celebrities come …

Any more phrases with similar usages like this?

It is usually ‘and last but not least’ (no ‘the’). It means ‘last listed but equally important’. I can’t think of other phrases ‘with similar usages’.

First and foremost - more than anything else
“First and foremost he is a writer, though he also lectures sometimes.”

Thanks to all.