01of 13Children’s Television Workshop/GettySesame Street’s first hosts, Matt Robinson (Gordon), Will Lee (Mr. Hooper), Loretta Long (Susan) and Bob McGrath (Bob), pose withBig Birdon the set of the educational public television series in 1969.

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Children’s Television Workshop/Getty

‘Sesame Street’

Sesame Street’s first hosts, Matt Robinson (Gordon), Will Lee (Mr. Hooper), Loretta Long (Susan) and Bob McGrath (Bob), pose withBig Birdon the set of the educational public television series in 1969.

02of 13Afro American Newspapers/Gado/GettyJames Earl Jonesjoins Big Bird, Mr. Hooper and Maria on set to try the perfect egg cream back on April 5, 1969, in N.Y.C.

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Afro American Newspapers/Gado/Getty

Sesame Street

James Earl Jonesjoins Big Bird, Mr. Hooper and Maria on set to try the perfect egg cream back on April 5, 1969, in N.Y.C.

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Grey Villet/The LIFE Picture Collection via Getty

Sesame Street

04of 13Bill Pierce/The LIFE Images Collection via GettyActor Matt Robinson films with Cookie Monster, who has his eyes set on — what else? — a big plate of cookies.

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Bill Pierce/The LIFE Images Collection via Getty

Sesame Street

Actor Matt Robinson films with Cookie Monster, who has his eyes set on — what else? — a big plate of cookies.

05of 13Bill Pierce/The LIFE Images Collection via GettyActor Will Lee chats with Oscar the Grouch during a scene that aired in the show’s premiere season.

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Sesame Street

Actor Will Lee chats with Oscar the Grouch during a scene that aired in the show’s premiere season.

06of 13GettyThe four original hosts — Bob McGrath, Matt Robinson, Will Lee and Loretta Long — share some laughs on set.

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Getty

Original Cast of Sesame Street

The four original hosts — Bob McGrath, Matt Robinson, Will Lee and Loretta Long — share some laughs on set.

07of 13David Attie/GettyPuppeteer Jim Henson holds Bert during rehearsals for an episode ofSesame Streetat Reeves TeleTape Studio in 1970 in N.Y.C.

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David Attie/Getty

Sesame Street

Puppeteer Jim Henson holds Bert during rehearsals for an episode ofSesame Streetat Reeves TeleTape Studio in 1970 in N.Y.C.

08of 13David Attie/GettyPuppeteers Daniel Seagren (holding Roosevelt Franklin), Jim Henson (holding Grandmother Happy) and Frank Oz (holding Betty Lou) rehearse for an episode at Reeves TeleTape Studio.

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Sesame Street

Puppeteers Daniel Seagren (holding Roosevelt Franklin), Jim Henson (holding Grandmother Happy) and Frank Oz (holding Betty Lou) rehearse for an episode at Reeves TeleTape Studio.

09of 13David Attie/GettyActor and singer Bob McGrath rehearses at Reeves TeleTape Studio in 1970 in N.Y.C.

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Sesame Street

Actor and singer Bob McGrath rehearses at Reeves TeleTape Studio in 1970 in N.Y.C.

10of 13Bettmann/ GettyJim Henson poses with a few of his Muppet creations, who became a major factor in the success of theSesame Streetseries.

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Bettmann/ Getty

Jim Henson With Muppet Creations ( Sesame Street)

Jim Henson poses with a few of his Muppet creations, who became a major factor in the success of theSesame Streetseries.

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Sesame Street

12of 13David Attie/GettyJim Henson (holding an ‘Anything Muppet’ dentist) and Frank Oz (holding an ‘Anything Muppet’ postman) take their posts during rehearsal.

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Sesame Street

Jim Henson (holding an ‘Anything Muppet’ dentist) and Frank Oz (holding an ‘Anything Muppet’ postman) take their posts during rehearsal.

13of 13GettyBig Bird, Mr. Hooper, Gordon, Oscar the Grouch, Bob and Susan pose at the now-famous 123 Sesame Street, after it was confirmed that the show was greenlit for a second season, which premiered on Nov. 9, 1970.

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Cast of Sesame Street

Big Bird, Mr. Hooper, Gordon, Oscar the Grouch, Bob and Susan pose at the now-famous 123 Sesame Street, after it was confirmed that the show was greenlit for a second season, which premiered on Nov. 9, 1970.

source: people.com