Grey's Anatomy has cast former Boston Legal and Entourage actress Constance Zimmer for the current season.

Zimmer is well-known for her role as Dana Gordon on Entourage, and the 42-year-old Seattle native will join the ABC medical drama, which is based in the city of Seattle, playing Dr Cahill.

Described as a 'confident, self-possessed, laser-focused professional with a wicked sense of humour', Cahill will be the focus of a four-episode arc during the current season of the show.