J.K. Rowling and Jessica Williams celebrate joint birthday

author J.K. Rowling set the Internet buzzing on Tuesday after sharing a photo of herself celebrating her birthday with former Daily Show star Jessica Williams.

The writer and the comedy actress were both born on July 31 and they got together this past Monday for a joint party.

Rowling turned 52 while Williams turned 28.

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Fast friends: Harry Potter author J.K. Rowling shared this photo of herself and comedy actress Jessica Williams celebrating their joint birthday Monday

Fast friends: author J.K. Rowling shared this photo of herself and comedy actress Jessica Williams celebrating their joint birthday Monday

The photo Rowling shared on

showed the pair sitting at a dining table each with a birthday cake and lit candles in front of them.

Williams is wearing a tiara while Rowling explained she wasn't because 'my tiara really pinched'. 

The comedienne, who worked for Jon Stewart on his Comedy Central show, is wearing a pretty floral sleeveless dress in the pic.

The Fantastic Beasts novelist wears a pastel

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