See the 'Grey's Anatomy' Cast Celebrate 350 Episodes (PHOTOS)

Meredith Jacobs

Grey's Anatomy is the longest-running medical drama on television, and it will celebrate another milestone episode this season.

The ABC series already surpassed ER's record of 331 episodes, and in Season 16, it will reach 350 episodes. To mark the occasion, the network gathered the stars and executive producers, as well as ABC Entertainment President Karey Burke, for a cake-cutting ceremony in Los Angeles on Tuesday.

The 14 Most Famous 'Grey's Anatomy' Guest Stars Ever (PHOTOS)

The 14 Most Famous 'Grey's Anatomy' Guest Stars Ever (PHOTOS)

From Emmy winners to Oscar nominees, here are all of the biggest name guest stars over the years.

Click through the gallery above to see the sweets and the cast at the event.

Grey's Anatomy, Thursdays, 8/7c, ABC