Anthony Williams and Stephanie Stephens were picked up Monday in Atlanta, WSB-TV reported. The couple was indicted two months ago in Bartow County on charges that include murder and possession of drugs with intent to distribute.
Jewell Williams was 14 months old when she died in June 2007.
Two more defendants face drug charges but have not been charged with causing the girl's death.
2014: The Year in Music [PHOTOS]