last but not least
Last in sequence but not least in importance, as in Last but not least, I want to thank all the people who sent me copies of my article in the paper. [Late 1500s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.