Actor-filmmaker Farhan Akhtar is having sleepless nights!

"Sleep has been playing hide and seek these last few nights. Must be terrible suffering from insomnia, " Farhan posted on Twitter.

The 37-year-old is currently working on "Don 2: The Chase Continues". It will be released in both 2D and 3D formats. He is happy with the 3D version.

"By the way, the Don 3D trailer looking awesome! Will now refer to 3D version of Don as D:3D... Like the sound of it, " he added.