"M'am, not Mum!" said the retired rugby star, who is married to the Princess Royal's daughter, Zara Mike Tindall knows just what to call his royal mother-in-law, Princess Anne. On Nov. 4, the retired rugby star made the revelation while appearing on Good Morning Britain to discuss his new book,

Mike Tindall has given a unique insight into his close bond with Princess Anne - including what he calls his mother-in-law behind closed doors. The former rugby professional married Zara Tindall - who is Princess Anne 's only daughter - back in 2011.

Mike Tindall has highlighted the special roles that Princess Kate, Prince William and Princess Anne hold in the world of rugby. The former England international rugby player who is married to Princess Anne's daughter Zara Tindall has a strong bond with the senior members of the Royal Family.

As voters hit the polls on Election Day, celebrities are showing up to voting centers and posting selfies with “I voted” stickers en masse. Some are taking it one step further, like Anne Hathaway, for instance,

"Voting is magic but also annoying." Anne Hathaway is caught up on her Sabrina Carpenter tunes. The Devil Wears Prada actress belted out an altered version of Carpenter's song "Please Please Please" to urge would-be voters who are line when polls close to stay there until they cast their ballot.

You’ve waited out this long, let’s make it not boring…please, please, please, hold the line,” she finished. In her caption, she also