London, March 11: Rock star Rod Stewart has admitted that becoming a father at 66 is very tiring.

The `knackered' rocker, who became a father for the eighth time last month, says new baby Aiden is definitely keeping him on his toes.

Stewart made the comments as he rushed round Harrods buying baby clothes.

He added that wife Penny was doing very well since the birth.

"Penny and the baby are doing just fine," the Daily Express quoted him as saying.

"Penny's recovering well. At my age, a new baby is bloody exhausting, it doesn't stop, but I'm very lucky and proud to have had this happen in my life. Knackered or not, Aiden is a beautiful little boy," he said. (ANI)