'Gilmore Girls' star Edward Herrmann is to appear in a guest role on 'Grey's Anatomy'.
The Hollywood Reporter says that full details of Herrmann's role are being kept secret, but it is understood that he will play a doctor in at least three episodes.
Herrmann played Richard Gilmore, Lorelai's (Lauren Graham) father, in 'Gilmore Girls'.
He won an Emmy in 1999 for his guest star role in 'The Practice'.
The fourth series of 'Grey's Anatomy' is currently shooting in the US.
