United Kingdom, July 14 -- Robbie Williams has revealed that his mother no longer knows who he is due to her dementia.

The Angels hitmaker heartbreakingly explained that his mum Janet, 84, no longer recognises him during a recent concert on his Britpop Tour in Germany.

Robbie said: "My mother has dementia and she doesn't know who I am anymore.

"She doesn't know where she is anymore."

The former Take That singer also discussed how his father Peter, who is also a singer, is suffering from Parkinson's disease while his mother-in-law's health is faltering too.

Robbie said: "My dad has Parkinson's and he can't leave the house.

"He used to sing with me every night on stage, he would come out, steal the show and be charming and then wander...