As we've talked about a couple of times, a multi-episode crossover between Grey’s Anatomy and Private Practice is planned for February, and Grey’s Anatomy star Sandra Oh is talking to People about who’s coming and who’s going.

“Crossover crazy!” Oh said of executive producer Shonda Rhimes’ plans to cross-pollinate the casts of her medical drama and its sophomore spin-off early in 2009.

Kate Walsh’s Dr. Addison Montgomery - who split from Seattle Grace to launch the spin-off and made one return trip last spring - is expected back in her old OR.

Interestingly, Oh revealed that Patrick Dempsey’s Dr. Derek Shepherd (a.k.a. McDreamy) will likely be making the trek to California's Oceanside Wellness Center.

“It has to do with Addison,” she said. “I think the Chief is going to visit, too,” she added, perhaps suggesting some unfinished business between Addison and Seattle Grace’s head of staff, Dr. Richard Webber (James Pickens, Jr.).

Oh also has a suggestion for the writers in case they want to send her character to Ocean Wellness Center to hook up with a handsome doctor.

“Paul [Adelstein]’s character,” she says. “Cristina Yang would have scenes with Cooper. They’d just wrestle the whole time!”

But back at Seattle Grace, Cristina already has a budding relationship with ex-military doctor Owen Hunt, played by Kevin McKidd.

The pair shared a steamy kiss early on in the Season Five premiere, but Oh likes that the two of them haven’t become an instant McCouple.

“It’s a nice, slow romance,” she says.

“A lot of time people on Grey’s Anatomy get together quickly, but that’s not the case here. It’s nice to be able to see a relationship develop and grow.”

Sandra Oh mostly refrained from commenting on some of Grey’s Anatomy's occasionally polarizing plot lines, most recently the strange and intriguing romance between Izzie (Katherine Heigl) and deceased Denny (Jeffrey Dean Morgan).

“I’m very happy with my story lines and I work hard on them, and the other things you just can’t control,” the acclaimed actress says.

“If someone is going to hate my character or Cristina’s romance with Owen, that’s up to them. I know that myself and Kevin McKidd work really, really hard and putting in some rich work, and so that’s all I concentrate on."

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