Elizabeth Perkins will soon be in need of Annalise Keating's help.

The former Weeds star has booked a guest appearance on How to Get Away with Murder Season 1, Entertainment Weekly confirms.

The veteran actress will play Marren Trudeau, a high-profile client represented by Viola Davis' attorney during an upcoming Case of the Week.

This same installment, set for October 16, will also feature Sara Paxton (The Beautiful Life) as a woman who works for Marren, while Niko Pepaj (Bunheads, Awkward) will portray Marren’s assistant.

How to Get Away with Murder is off to a very fast start in the ratings.

For a look ahead at How to Get Away with Murder Season 1 Episode 3, check out the following promo:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.