Kevin Spacey wants to act in Johnny Carson biopic

Actor Kevin Spacey is game to play late TV mogul Johnny Carson, but only if the script is edgy.

The Oscar winner is famous for his take-off of Carson, but he hasn't yet been approached for the upcoming NBC mini-series, and he insists he won't even consider the project unless the screenplay is appropriate, reports contactmusic.com.

"If (NBC) wants to start writing as if they're a cable network, then absolutely I'd do it, but I'm afraid it would just be too marshmallow, and Johnny deserves something that's tougher with more expletives," said Spacey.