Mary Chieffo

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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 »

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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)

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Personal Details

Alternate Names:

The Cast of Star Trek


6' (1.83 m)

Did You Know?


Daughter of Beth Grant and Michael Chieffo. See more »


Towering height

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