Photo shared by Kareena Kapoor Khan on Instagram.

Bollywood actors have their own fetishes and unique likes and dislikes.

If you were under the impression that Aamir Khan is Kareena Kapoor Khan's favourite co-star, think again.

The actress has just revealed that the tag goes not to the superstar but his pillow!

On Aamir Khan's 55th birthday on Saturday, Kareena shared a glimpse of the actor for his fans on Instagram.

In the photograph, Aamir can be seen sleeping in a flight, with his favourite pillow tucked under his head.

Apparently, he carries the pillow with him everywhere.

The actress jokingly wrote: "My fav co-star has to be @_aamirkhan's... pillow!"

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Aamir and Kareena have been shooting in Punjab for their upcoming film "Laal Singh Chaddha".

Unconfirmed reports state the Advait Chandan directorial will hit theatres on Christmas this year.