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Katherine Heigl Dishes on Patrick Dempsey’s Exit from ‘Grey’s Anatomy’ — Plus See the Show’s Cast Then and Now!

In a candid new interview, Katherine Heigl opened up about her six-season stint on Grey’s Anatomy — and revealed she was “devastated” when show creators killed off costar Patrick Dempsey‘s character this past May.

“I just can’t imagine the show without McDreamy. It’s just so hard to picture,” the 36-year-old actress said of Patrick no longer portraying Dr. Derek Shepherd (aka “McDreamy”) on the hit series.

katherine heigl 'grey's anatomy'
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Katherine and Patrick on Grey’s Anatomy.

Katherine starred on the medical drama as Dr. Izzie Stevens from 2005 until 2010. “It changed the course of my life and my career, and I couldn’t be more grateful,” the mom-of-two said of her time on Grey’s.

RELATED: “It’s Really Sad” — Katherine Heigl Opens Up About Patrick Dempsey’s Divorce

As for whether there is any truth to rumors recently swirling that Katherine might reprise her role as Izzie for the show’s upcoming 12th season? “There is not, I’m sorry,” she told [Entertainment Tonight](http://www.etonline.com/tv/166632katherineheiglcantimaginegreyswithoutmcdreamy/)_.

Ever wonder what the rest of the Grey’s Anatomy cast has been up to lately? Click through the gallery below to see the Seattle Grace Hospital doctors then and now!