Dierks Bentley and wife welcome baby boy

LOS ANGELES, CA - FEBRUARY 10: Singer Dierks Bentley and wife Cassidy Black arrive at the 55th Annual GRAMMY Awards at Staples Center on February 10, 2013 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
Jason Merritt

Dierks Bentley is a dad for the third time.

The country crooner and his wife, Cassidy, welcomed a baby boy on Wednesday in Nashville, Tenn. Baby Knox joins big sisters sisters Jordan Catherine, 2, and Evalyn Day, 5.

Bentley announced the news on Twitter:

And on Thursday, Bentley posted a photo of his daughters: