GUILTY: A nanny claimed the devil told her to stab two young children to death.

The court was told she had taken the children to their apartment – instead of dance class – and stabbed them to death with kitchen knives in the bathroom.

Yoselyn Ortega, 55, was found guilty by a jury of murdering Lucia ‘Lulu’ Krim, six, and her two-year-old brother Leo.

The children’s mother spoke of the shock and horror she felt upon returning to the family’s Upper West Side apartment to find her children slain and their nanny standing over them stabbing her own neck with a knife. 

Judge Gregory Carro on Monday called the case “pure evil” before issuing the sentence of life without the possibility of parole.