![Alex Hirsch on Twitter: "Happy Birthday to the Mabel to my Dipper, Ariel Hirsch! (Seen here about to beat up the Little Rascals) https://t.co/CfuCq4elgA" / Twitter Alex Hirsch on Twitter: "Happy Birthday to the Mabel to my Dipper, Ariel Hirsch! (Seen here about to beat up the Little Rascals) https://t.co/CfuCq4elgA" / Twitter](https://pbs.twimg.com/media/DCpDmvbV0AAhFmy.jpg)
Alex Hirsch on Twitter: "Happy Birthday to the Mabel to my Dipper, Ariel Hirsch! (Seen here about to beat up the Little Rascals) https://t.co/CfuCq4elgA" / Twitter
![SDCC 2014 - Gravity Falls - Ariel & Alex Hirsch - San Diego Comic-Con International - FindingMickey.com SDCC 2014 - Gravity Falls - Ariel & Alex Hirsch - San Diego Comic-Con International - FindingMickey.com](http://findingmickey.squarespace.com/picture/sdcc14-gravityfalls-alexariel.jpg?pictureId=19818862&asGalleryImage=true)
SDCC 2014 - Gravity Falls - Ariel & Alex Hirsch - San Diego Comic-Con International - FindingMickey.com
![Ariel Hirsch on Twitter: "To my forever buddy @_AlexHirsch: Happy birthday, brother! And hey, thank you for Gravity Falls. I never could have expected our childhood to be immortalized in such a Ariel Hirsch on Twitter: "To my forever buddy @_AlexHirsch: Happy birthday, brother! And hey, thank you for Gravity Falls. I never could have expected our childhood to be immortalized in such a](https://pbs.twimg.com/media/FVjD4xlVEAATPdI.jpg)
Ariel Hirsch on Twitter: "To my forever buddy @_AlexHirsch: Happy birthday, brother! And hey, thank you for Gravity Falls. I never could have expected our childhood to be immortalized in such a
![Alex Hirsch on Twitter: "A historic moment! @kristenschaaled finally meets my twin sister, Mabel inspiration @_merp_derp_! #WhenMabelsCollide http://t.co/cXdhFdLLoP" / Twitter Alex Hirsch on Twitter: "A historic moment! @kristenschaaled finally meets my twin sister, Mabel inspiration @_merp_derp_! #WhenMabelsCollide http://t.co/cXdhFdLLoP" / Twitter](https://pbs.twimg.com/media/BtmCz4JCYAMoymE.jpg)