Mumbai, July 13 (IANS) Abhishek Bachchan is playing the perfect doting husband to wife Aishwarya Rai. When she fell ill after rigorous rehearsals for their much talked about 'Unforgettable' world tour that kicks off in Toronto Friday, Abhishek learnt her steps too.

'We have been rehearsing for the tour non-stop for nearly a month now. Shiamak (Davar) has been working us around so hard to get our dance steps right that my wife Aishwarya fell sick with exhaustion. For three days, she could not move out of the house,' said Abhishek.

'That put an additional burden on me as I had to do her steps also, not only at the rehearsal hall but at home too in order to teach her the dance steps Shiamak had given her for the songs she would be dancing to during the tour,' he told reporters.

Abhishek says now he is ready to pitch in for both his father, Amitabh Bachchan, and wife.

'I told the 'wizzies' (members of Wizcraft, which is putting together the tour) that if she falls sick again and won't be able to dance during the show they should not get panicky because I have learnt all her steps and might as well double for her.

'Moreover, dad's body is also no longer as nimble as it was. In case he gets tired during the tour I may have to do the 'Kajra re...' number all by myself. Well, I am prepared for that, too,' Abhishek said with a straight face during a media meet here. His impromptu 'act' threw everybody into splits at the event.

Apart from the Bachchans, Preity Zinta, Riteish Deshmukh, composer duo Vishal-Shekhar are also part of the tour. There will be some guest stars as well -- Akshay will perform in Toronto, Shilpa Shetty in Britain and Madhuri Dixit in the US.