The Office was on the air for nine seasons, from March 24, 2005, to May 16, 2013. Here's how much the cast changed during the series' run.
Pamela Morgan Halpert (née Beesly)
Angela Noelle Schrute (née Martin)
Phyllis Margaret Vance (née Lapin)
Toby Flenderson the Evil Snail
Meredith Elizabeth Palmer
And of course, Michael Gary Scott