Many entertainment A-listers also took to Twitter to give the former secretary of state a happy birthday. Here's a look at the well-wishers:
Actress and writer Lena Dunham.
Basketball legend Earvin “Magic” Johnson.
Congressman Joaquin Castro, whose brother, Housing Secretary Julian Castro, is on her list of potential running mates.
Filmmaker Michael Moore.
Singer Katy Perry surprised Hillary with a birthday gift at a campaign rally in Iowa.
Celebrity gossip blogger Perez Hilton.
Former President Bill Clinton also wished his leading lady a happy birthday on Twitter.
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