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Aubrey Plaza as April Ludgate -

Plaza is a hilariously awkward assistant in 'Parks and Recreation' to Ron Swanson (played by Nick Offerman), who she loyally respects the request of to not be disturbed by not giving his messages and canceling his meetings.

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Megan Mullally as Karen Walker -

In 'Will & Grace,' it's not very clear who the assistant is, as Karen Walker never really completes any of the tasks Grace assigns her. However, she is loyal, despite just working as a hobby.

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Christina Hendricks as Joan Holloway -

In a world where men dominate the advertising industry in 'Mad Men,' Joan Holloway begins as an assistant at a reputable firm. A natural-born go-getter, she is discrete and assertive and works to earn her seat at the table in the boardroom.

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Harry Shearer as Waylon Smithers -

Waylon Smithers is the famed assistant of Mr. Burns in 'The Simpsons.' Following in the footsteps of his father as serving as an assistant to the Burns family (who own the Springfield Nuclear Power Plant), Smithers tends to every need of Mr. Burns with devotion and love.

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Jenna Fischer as Pam Beesley -

In 'The Office,' Jenna Fischer plays a smiling assistant who keeps up with the demands of her boss even after she resigns and falls in love with her co-worker Jim Halpert.

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Jane Krakowski as Elaine Vassal -

In 'Ally McBeal,' Elaine Vassal serves as Ally McBeal's assistant. Vassal spends her time gossiping around the office and flirting with co-workers before proving herself to be a phenomenal legal researcher.

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Julia Roberts as Erin Brockovich -

Erin (who is based on a real person), a financially-struggling single mother, works her way to becoming a legal assistant and comes across a case against Pacific Gas and Electric. In moral turmoil, Erin must sacrifice her home life and go beyond responsibilities expected of her at work to solve a case to save lives.

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Michael Urie as Marc St. James -

Marc St. James will step over anyone through gossip and manipulation to get his boss Wilhelmina the position of editor of Mode magazine.

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Rex Lee as Lloyd Lee -

In 'Entourage,' the character of Lloyd Lee is constantly put down for his sexuality and race as a homosexual Chinese-American, but has thick skin, rolls with the punches, and is a real go-getter as Ari Gold's manager.

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Hugh Fraser as Captain Hastings -

In the television series 'Agatha Christie's Poirot,' Hastings is the unofficial assistant to Belgian detective Hercule Poirot, who is the best of his kind and never fails to solve an impossible mystery.

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'Murphy Brown' (1988) -

In the sitcom, Murphy Brown is the star reporter of FYI, a newsmagazine series. She's played by Candice Bergen and is an impossible boss to please, hence why there was a constant rotation of secretaries. The gag of her not being able to keep a secretary resulted in an incredible list of cameos, including John F. Kennedy Jr., Paul Reubens, Michael Richards (in his Kramer role from 'Seinfeld'), Sally Field, Bette Midler, and more.

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Carol Burnett as Mrs. Wiggins -

In the variety program 'The Carol Burnett Show,' Carol Burnett played Mrs. Wiggins, a dim-witted, inappropriately-dressed secretary who stumbles through her days at the office.

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Kimmy Robertson as Lucy Moran -

In 'Twin Peaks,' Kimmy Robertson plays a receptionist at the sheriff's department. Listening in on conversations from time to time, Lucy Moran always knows how to behave and what to say because she knows everything that goes on.

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Barbara Hale as Della Street -

Della Street (right) serves as Mason’s (left) loyal and efficient confidante in 'Perry Mason.' Maintaining her cool and sharp wit, she helps him solve impossible cases.

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Loni Anderson as Jennifer Marlowe -

In 'WKRP in Cincinnati,' Loni Anderson's character fights an uphill battle attempting to prove that she's not just another "dumb blonde." Smart and sassy, she makes sure that her boss is well taken care of while making sure she's not just the assistant who spends her days making coffee.

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Marla Sokoloff as Lucy Hatcher -

In 'The Practice,' Marla Sokoloff's character plays a young and flippant woman who joins the firm to the discontent of many of her co-workers. When she is exploited sexually, she speaks up and earns the respect and acceptance of the firm.

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Jean Smart as Charlene Frazier -

In 'Designing Women,' Charlene Frazier is a partner at a design business, and her experience as a secretary makes her qualified to take care of administrative duties.

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Eddie Cahill as Tag Jones -

Eddie Cahill played Rachel Green's assistant Tag Jones on 'Friends.' Rachel hires him at Ralph Lauren despite his lack of qualifications and only based on looks, and later cannot resist him.

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David Spade as Dennis Finch -

In 'Just Shoot Me!,'  Dennis Finch is a quirky and indispensable assistant to his boss because of his quick thinking, undying loyalty, and ability to predict his boss' every need.

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Judy Greer as Kitty Sanchez -

In 'Arrested Development,' Greer plays a whacky secretary to George Sr. Her character, Kitty Sanchez, is completely incompetent and supposedly only got the job through an affair with George Sr.

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Maulik Pancholy as Jonathan -

Maulik Pancholy's character Jonathan in '30 Rock' is a loyal and submissive assistant. He'll do anything for his boss, to the point where it's pretty creepy.

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Marcia Wallace as Carol Kester -

In 'The Bob Newhart Show,' Marcia Wallace played Carol Kester, assistant to several doctors. With extreme competence, she runs the place how she sees fit. Her quick wit and intelligence keeps everyone around her on their toes.

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Kathryn Joosten as Dolores Landingham -

On 'The West Wing,' Kathryn Joosten played Dolores Landingham, an honest and trustworthy "big sister" to the President.

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Susan Ruttan as Roxanne Melman -

Susan Ruttan played Roxanne Melman in 'L.A. Law.' Her character was a more-than-capable assistant to a rude and ignorant divorce lawyer named Arnie Becker.

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Vicki Lewis as Beth -

In the series 'NewsRadio,' Vicky Lewis' character plays the role of an assistant to a young news editor at a New York radio station. His fondness of her lends her a lot of leeway to wear what she wants, chew gum, and wear absurd hats in the workplace.

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Gail Fisher as Peggy Fair -

In 'Mannix,' Peggy Fair is smart, loyal, and discrete in assisting the work and investigations of detective Joe Mannix. Fisher was the first African American to have a regular role in the series and won a Primetime Emmy and two Golden Globe awards for her performance.

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Nancy Kulp as Jane Hathaway -

In 'Beverly Hillbillies,' the character of Jane Hathaway is constantly saving the boss from his greed. She earns a special place in the family.

Sources: (GoldDerby)

See also: The greatest female friendships in television history

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