Abigail Spencer's prolific career means she has several costars across several projects that could guest star on her new Fox series Best Medicine. "I'd really love for my friend Busy Philipps to come on. I think she would be hilarious. If Jen Tullock and Michael Chernus could come over from Severance, they'd be amazing," Spencer, 44, who plays Louisa, exclusively shared during Us Weekly's visit to the Best Medicine set. "Anybody [can come over here] - like my friend Nina Dobrev." Spencer has already found herself asking her famous friends to make appearances.