According to Soap Opera Digest, McCullough will be seen on the ABC soap until early 2012. McCullough joined 'General Hospital' in 2005. The actress intends to pursue directing.
"Expect a poignant and must watch storyline for Robin and Patrick," a show rep told Soap Opera Digest.
McCullough's exit comes hot on the heels of Jonathan Jackson's departure. The veteran 'GH' player will leave the soap in December.
In other casting news ...
Frances Sternhagen will guest star on 'Parenthood.' The veteran actress will play Zeke's mom in an early 2012 episode. [TVLine]
Conan O'Brien will play himself on Lisa Kudrow's 'Web Therapy.' He's the first star to play himself on the web show. He'll appear in three episodes. [THR]
Sebastian Sozzi, Rachel Cannon and Sadie Calvano have joined 'Village People.' The trio will co-star opposite Jennie Garth in the ABC Family comedy pilot. [Deadline]
Andrea Rosen will star in Showtime's 'The Andrew Gurland Project.' She'll star opposite Andrew Gurland in the first-person documentary comedy. [Deadline]