Grey's Anatomy to get spin-off

The US ABC network is planning a spin-off of its hit medical series Grey's Anatomy, featuring the character of Dr Addison Montgomery-Shepherd, played by Kate Walsh.

The show's creator, Shonda Rhimes, is preparing a two-hour episode Grey's Anatomy, set to air in May, that would serve as the pilot episode for the proposed spin-off.

If the network approves, the show will be considered for spot on the schedule next autumn.

An ABC spokeswoman confirmed the plans, but said the plot line for the spin-off was being kept under wraps and no title has been selected.

Grey's Anatomy has remained hugely popular in the US ratings since its premiere in April 2005.