Mackenzie Phillips Returning for 'One Day at a Time' Reboot (Exclusive)

Netflix is staging a key One Day at a Time reunion.

Original series star Mackenzie Phillips is returning to the Norman Lear franchise for the streaming giant's revival, The Hollywood Reporter has learned.

But there's a catch. Phillips, an original series star who played rebellious eldest daughter Julie in the CBS original, will not be reprising her role. Instead, she will guest-star as Pam, a psychologist and leader of a female veterans' therapy group that Penelope (Justina Machado) reluctantly attends in a later episode. (Watch a first-look video of Phillips' return, above.)

Phillips' casting marks a key reunion with Lear, who was forced to fire the former series star during One Day at a Time's original run.  

Netflix's reimagining of the iconic comedy revolves around three generations of a Cuban-American family living under one roof. Newly single mom and military veteran Penelope enlists the "help" of her old-school Cuba-born mother, Lydia (Rita Moreno), and building manager, Schneider (Todd Grinnell), while raising two millennials: her radical daughter Elena (Isabella Gomez) and socially inept son Alex (Marcel Ruiz). Lear, who created the original series, executive produces the revival alongside How I Met Your Mother's Gloria Calderon Kellett and Men of a Certain Age's Mike Royce.

The series debuts Jan. 6 on Netflix.