Addison Montgomery's journey on Grey's Anatomy and Private Practice showcased her evolution from a potential villain to a fan favorite. Private Practice explored Addison's fertility struggles, love triangles, and complex female friendships, adding depth to her character. Addison found her true love and happy ending with Jake Reilly and formed a profound sisterhood with Amelia Shepherd on both shows.

Addison Forbes Montgomery was the first character to shake up Grey's Anatomy. The narrative -- and Kate Walsh's portrayal of the character -- in Season 1 quickly encouraged fans to root for Addison instead of deeming her a villain. She continually won people over with her incredible surgical skills and prickly yet lovable personality, to the point where Addison's story became bigger than Grey's Anatomy could contain. Thus, the spinoff Private Practice was born.

Private Practice followed Addison after moving to Los Angeles to do something for herself and something...