IMDb > Leonard 'Lenny' Kosnowski (Character)
Leonard 'Lenny' Kosnowski
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Leonard 'Lenny' Kosnowski (Character)
from "Happy Days" (1974)

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Photos (See all 3 | slideshow) Related Videos (see all 19)
Happy Days -- A troubled student overdoses on pills while staying overnight at Joanie's.
Happy Days -- The Fonz pleads "The Fifth" when he's accused of hitting a student.
Happy Days -- An amorous student wreaks havoc on Joanie's first teaching assignment.
Happy Days -- Howard hires Fonzie's rowdy students to build an additional bathroom.
Happy Days -- The guys take the Fonz to a singles resort after his breakup with Ashley.

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Alternate Names:
Lenny 'Leonard' Kosnowski


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Jump to filmography: Archive Footage
  1. Entertainment Tonight Presents: Laverne and Shirley Together Again (2002) (TV) Played by Michael McKean

  2. "Laverne & Shirley"
    ... aka "Laverne & Shirley & Company" - USA (syndication title)
    ... aka "Laverne & Shirley & Friends" - USA (syndication title)
    ... aka "Laverne DeFazio & Shirley Feeney" - USA (first season title)
        - Please Don't Feed the Buzzards (1983) TV episode, Played by Michael McKean
        - The Ghost Story (1983) TV episode, Played by Michael McKean
        - The Baby Show (1983) TV episode, Played by Michael McKean
        - Death Row: Part 2 (1982) TV episode, Played by Michael McKean
        - The Note (1982) TV episode, Played by Michael McKean
          (145 more)

  3. "Happy Days"
        - Fonzie's Funeral: Part 2 (1979) TV episode, Played by Michael McKean
Archive Footage:
  1. "TV Land Confidential"
    ... aka "TV Land Confidential: The Untold Stories" - USA (second season title)
        - Oddballs & Original Characters (2007) TV episode, Played by Michael McKean

Additional Details

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Fun Stuff

From "Laverne & Shirley: A Nun's Story (#1.4)" (1976)
Leonard 'Lenny' Kosnowski: Then I cheated on a hygeine quiz in 9th grade but I don't know if it counts because I flunked. I think I'm good through 10th grade because I was out that year with ringworm.
Anne Marie: I better go.
Leonard 'Lenny' Kosnowski: Oh you can't catch it from me now, I washed with that yellow soap.
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