Grey's Anatomy is a popular medical drama series that has featured numerous notable guest stars throughout its long run. Many of these appearances are memorable, but there are also some stars that fans may have forgotten appeared on the show. Here is a list of the top 10 stars you may have forgotten appeared on Grey's Anatomy.

One such star is Demi Lovato, who appeared in the fifth season of the show as a patient who suffered from rage blackouts.

Lovato's performance was highly praised by fans and critics alike.

Another surprising guest star on Grey's Anatomy was Mandy Moore. She appeared in the sixth season as a patient who had accidentally swallowed several razor blades. This role showcased Moore's acting skills and added an emotional depth to the show.

Additionally, Sarah Paulson, known for her roles in American Horror Story and Ratched, also made a guest appearance on Grey's Anatomy.

She played a mother who was struggling with an unusual condition that caused her body to age rapidly.

Other stars who made appearances on the show include Elisabeth Moss, Seth Green, Faye Dunaway, and Danny Glover. Each of these actors brought their own unique talents to Grey's Anatomy and added a little extra excitement to the series.

Overall, Grey's Anatomy has had a knack for attracting top stars to make guest appearances. While these stars may have been forgotten by some, their performances on the show were definitely memorable.