The 25-year-old has put pen-to-paper to a three-year contract at the Walkers Stadium leaving Hornets boss Malky Mackay disappointed.
Mackay had admitted tabling a bid for the former Scotland international.
Sam Allardyce was on Friday handed his dream job of managing England, 10 years after missing out on the role.
Hull are looking for a new manager following the departure of Steve Bruce.
Jose Mourinho appears set to strengthen his defensive cover with the right-back area seemingly of particular concern.
A curious case has occurred in the transfer market where a player has been purchased with no intention of using
The new Premier League season gets under way on August 13 with the big guns looking to right the wrongs
The latest gossip and rumours from the newspapers and online:The Daily Telegraph is reporting that Tottenham are ready to give