There's been a slight shake-up at Dancing With the Stars.

When the show returns for its new season on March 22, neither Lacey Schwimmer nor Jonathan Roberts will take to the floor.

Over the past few days, each has Tweeted that he/she won't appear on the new season, though Roberts won't rule out the occasional result-night numbers.

Schwimmer (pictured) has been with the show since 2008. She previously partnered with Lance Bass, Steve-O and Mark Dacascos. Will you miss her or Roberts on Dancing with the Stars?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.