It's only a matter of time until the worlds of Grey's Anatomy and Private Practice collide again, and in this case, we particularly expected it, given a newbie cast on the latter.

From the moment Caterina Scorsone signed on to play Amelia Shepherd, Derek Shepherd's sister, on Private Practice, fans wondered when will the big family reunion was.

They need wonder no more executive producer Shonda Rhimes tells TV Guide.

"I would love to see what happens when Derek [Patrick Dempsey], his sister and their mom - because I love Tyne Daly - get together," Rhimes says. "I think it would be very interesting to experience. We're talking about possibly thinking about that for next season."

Get ready for a Shepherd family mini-reunion!

Might last week's revelation on Private Practice that Amelia and Derek both witnessed their dad's death, which led to Amelia overdosing and dying briefly, be rehashed?

That was a pretty heavy scene, even by Private Practice standards. There's also got to be more Shepherd baggage we don't know about yet. Any theories? Comments?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.