Mary Chieffo

Down 348 this week
Mary Chieffo is known internationally as the Klingon Commander turned Chancellor L'Rell on the award-winning Paramount+ series Star Trek: Discovery, most recently returning as her iconic character for the highly popular Star Trek Online. When she wasn't covered in prosthetics and speaking Klingon, Mary produced, wrote, and starred as Iago in ... See full bio »

The Best Shows Returning in 2021

Dive back into your favorites as we round up all the best series returning to TV and streaming in 2021.

See the full list

6 Shows Everyone's Still Talking About

It's not too late to join in the conversation on the buzzworthy shows that IMDb users can't get enough of.

Watch the video

Around The Web


Provided by Taboola

On Prime Video

User Lists

Related lists from IMDb users

a list of 33 images
created 25 Feb 2016
a list of 39 people
created 04 Feb 2018
list image
a list of 501 people
created 24 Feb 2020
a list of 745 people
created 01 Sep 2015
a list of 409 people
created 25 Jul 2014

Do you have a demo reel?

Add it to your IMDbPage

How Much Have You Seen?

How much of Mary Chieffo's work have you seen?

User Polls


Known For

The Perfect Fit Shop Girl
Miss Dial Teenage Girl Stranger
Herpes Boy Patch


Hide Hide Show Show Actress (15 credits)
  Operation Othello (TV Movie) (completed)
Ensign Iago
 2021 Slay (TV Series)
Dr. Elizabeth Diamond
- Case No. 738 - The Du-dobleahn (2021) ... Dr. Elizabeth Diamond
- Case No. 666: The Multiplicitor (2021) ... Dr. Elizabeth Diamond
 2020-2021 Heartbeats (TV Series)
Clare / Alicia Ayoub
- Rose of Glass (2021) ... Clare
- Short Security/Lucky Jacket (2021) ... Clare
- Blinded by the Lightbulb (2020) ... Alicia Ayoub
- Vending Machine of Broken Dreams (2020) ... Alicia Ayoub
 2017-2019 Star Trek: Discovery (TV Series)
- Such Sweet Sorrow, Part 2 (2019) ... L'Rell
- Through the Valley of Shadows (2019) ... L'Rell
- Point of Light (2019) ... L'Rell
- Will You Take My Hand? (2018) ... L'Rell
- The War Without, the War Within (2018) ... L'Rell
 2018 On the Day You Were Born (Short)
 2017 The Mindy Project (TV Series)
 2017 Shelby's Vacation (Short)
 2014 Odyssea (Short)
 2013 Miss Dial
Teenage Girl Stranger
 2012 The Perfect Fit (Short)
Shop Girl
 2010 Star Trek Online (Video Game)
L'Rell (voice)
 2009 Jack and Janet Save the Planet (TV Movie)
Tina Grotunski
 2009 Herpes Boy
 2008 Natural Disasters
Young Beth
Show Show Writer (1 credit)
Show Show Producer (1 credit)
Show Show Sound department (1 credit)
Show Show Additional Crew (1 credit)
Show Show Self (6 credits)

Related Videos


Personal Details

Alternate Names:

The Cast of Star Trek


6' (1.83 m)

Did You Know?


A 2015 BFA graduate in Group 44 of The Juilliard School's Drama Division, Chieffo is the first legacy in the Division's nearly 50 year history. Her father was in Group 6. See more »


Towering height

Contribute to This Page

Recently Viewed