Outlander fans as it's the day Diana Gabaldon published her first book, with 'World Outlander Day' being celebrated each year.
Despite the books and show being set in Scotland - the franchise has fans from all over the world with many today taking to social media to share their appreciation.
It wasn't only the fans who were celebrating, with the official Outlander page sharing a special video message from all the cast.
Sam, who plays main character Jamie Fraser, thanked the fans in the video for supporting the show and said it wouldn't be the same without them.He said: "And honestly we couldn't be doing this show without them (fans), you know the fact they have supported us.
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