Viola Davis, Andy Samberg added as Emmy Awards presenters

Viola Davis speaks at the "How To Get Away With Murder'' panel during the Disney/ABC Television Group portion of the 2014 Summer Television Critics Association on July 15, 2014, in Beverly Hills, California.

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Another round of stars has been added to the presenters list for this year's Emmy Awards.

Viola Davis and Octavia Spencer, who co-starred in "The Help" and both have new series premiering on television this coming season (Davis in ABC's "How to Get Away with Murder" and Spencer in Fox's "Red Band Society"), will take the stage during the ceremony, Emmys executive producer Don Mischer announced Thursday.

They'll be joined by Allison Janney (a two-time nominee this year, for CBS' "Mom" and Showtime's "Masters of Sex"), Keegan-Michael Key and Jordan Peele of "Key and Peele," Andy Sambeg ("Brooklyn Nine-Nine") and Lucy Liu of "Elementary."

Debra Messing, who stars in NBC's upcoming series "The Mysteries of Laura," will also present, as will Sofia Vergara ("Modern Family").

They join previously-announced presenters Halle Berry, Bryan Cranston, Zooey Deschanel, Julia Louis-Dreyfus, Woody Harrelson, Adam Levine, Matthew McConaughey, Julianna Margulies, Jim Parsons, Amy Poehler, Julia Roberts, Gwen Stefani and Kerry Washington.

The 66th Primetime Emmy Awards will air Monday, Aug. 25, on NBC, hosted by Seth Meyers.