Baltimore County Executive Kevin Kamenetz has announcement that he will be running for governor early Monday morning on Twitter.

Kamenetz, a Democrat, says he'll be making a special announcement in Towson on Monday.

Kamenetz has been county executive since December 2010.

RELATED: County exec. Rushern Baker to run for Maryland governor

The Democratic primary for governor is a crowded one for next year's election.

The field already includes Prince George's County Executive Rushern Baker, state Sen. Richard Madaleno and former NAACP president Ben Jealous also is running, along with former Michelle Obama aide Krish Vignarajah, entrepreneur Alec Ross and lawyer Jim Shea. The primary is June 26.