About
Kathleen Erin Walsh, known professionally as Kate Walsh, is an American actress and businesswoman. She is widely recognized for her portrayal of Dr. Addison Montgomery in the ABC medical drama series *Grey's Anatomy* and its spin-off, *Private Practice*. Walsh has also appeared in other television series and films, showcasing her range as an actress. Additionally, she has ventured into the business world, demonstrating her entrepreneurial spirit.
Career Timeline
'Grey's Anatomy' Debut
Begins her role as Dr. Addison Montgomery, gaining popularity.
'Private Practice' Spinoff
Leads the spin-off series 'Private Practice,' boosting her career.
Continued TV Success
Continues to star in 'Private Practice,' maintaining her status.
Post-'Practice' Roles
Appears in other television series and films, diversifying her portfolio.
Business Ventures Begin
Ventures into the business world, expanding her income streams.
Continued Acting
Continues to act and manage her business ventures.
Successful Actress and Entrepreneur
Kate Walsh maintains a successful career as an actress and businesswoman.
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Last updated: February 25, 2026