By Scott T. Sterling

Jack Antonoff went to Sesame Street and he’s got the pictures to prove it.

Related: Chance the Rapper Teases ‘Sesame Street’ Appearance with Shout Out to Daughter

The Bleachers’ principal shared a series of photos and videos from the legendary children’s show, including a personal message from Oscar the Grouch for his godson, Alfie.

Sesame Street also posted a photo from Antonoff’s appearance, thanking him for visiting the set.

Antonoff will appear on the upcoming 49th season of Sesame Street, which will premiere next year.

See the images below.

A post shared by jack antonoff (@jackantonoff) on

A post shared by jack antonoff (@jackantonoff) on

A post shared by jack antonoff (@jackantonoff) on

hi alfie 😘

A post shared by jack antonoff (@jackantonoff) on

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