You may remember her from 'Little Miss Sunshine' and 'Scream Queens' but she was also in a 'Grey's Anatomy' episode in season 3.
Mostly known for her role in 'Mad Men' and recently 'Handmaid's Tale', Elisabeth Moss played an anxious daughter taking care of her sick mother in season 3.
Rich Sommer was also in 'Mad Men'. He played a driving instructor in season 12.
Seth died on the show, but featured in two episodes in season 4.
She was in 'Princess Diaries' and 'Welcome to the Dollhouse' and played a woman in labor in season 11.
Best known for her role in 'Beetlejuice' and 'Thelma & Louise', Geena Davis played Dr. Nicole Herman in season 11.
The '13 Reasons Why' star played a little boy named Ryan in season 4.
Demi played a patient who was misdiagnosed with schizophrenia in season 6.
The super child actress best known for playing Eleven on 'Stranger Things' played a little girl in season 11.
Moore played 'Mary Portman' in Season 6 Episode 7.