The Tony Award winning actress and singer has joined the cast of Private Practice. Welcome, Audra McDonald.

The Tony Award winning actress and singer has joined the cast of Private Practice, replacing Merrin Dungey. We will miss you, Merrin, but we welcome Audra McDonald.

A photo of Audra McDonald, the classically trained actress and singer who has joined the cast of Private Practice.

Kate Walsh, Audra McDonald, Amy Brenneman and Tim Daly lead a stellar cast of ABC's new "Private Practice." The spin-off of "Grey's Anatomy" debuts September 26.

The new cast of Private Practice, with Audra McDonald in the place of Merrin Dungey, who played Naomi in the pilot. We are looking forward to this new series from Shonda Rhimes, creator of Grey's Anatomy!

A pic of the fabulous Audra McDonald, who plays Naomi Bennett on Private Practice. We look forward to seeing so much more from this awesome actress this year.

Audra McDonald looks great in this photo taken a year or so ago, before she was cast as Naomi Bennett in ABC's Grey's Anatomy spin-off, Private Practice.

Always a fan favorite, Audra McDonald poses for the camera.

Private Practice stars Kate Walsh, Audra McDonald and Amy Brenneman on the set of their hit series in September 2008. We can't wait for the show to return!

Michelle Visage lands the funniest joke on the runway talking about fatty acids in regards to mermaids.

Mrs. Dorothy Scott (Audra MacDonald) gets an unexpected visitor.