Strikes from Lee Tomlin and Tommy Rowe have given Peterborough the lead over Millwall at The Den at half time.
The visitors started the game on the front foot and took the lead in the seventh minute as George Boyd found Tomlin, who lifted the ball into the top corner.
Millwall responded almost immediately as James Henry lifted the ball over Posh keeper Robert Olejnik after the ball broke kindly for him on the edge of the penalty area.
Peterborough were impressive going forward and regained their lead in the 32nd minute as Boyd once again raided into the box before finding Rowe who smashed the ball into the net.
