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Rod Stewart is going to be back on diaper duty.

The rocker, 65, and wife Penny Lancaster are expecting their second child together, has confirmed.

They celebrated their third wedding anniversary in June.

Lancaster and Stewart -- who have been together for more than 10 years -- welcomed their first child, Alastair, in 2005.

"We were thrilled and delighted to be able to tell Alastair that he was going to be the big brother to a little baby, expected just before Mummy's 40th Birthday," they tell Us in a statement.

Stewart has five children from previous relationships – Kimberly, 30; Sean, 29; Ruby, 23; Renee, 18, and Liam, 15.