Hull have completed the signings of Manchester United winger Robbie Brady and Sunderland midfielder David Meyler.
The two Republic of Ireland internationals, who are thought to have cost the promotion-chasing Tigers around £3.5 million between them, have both signed contracts that will keep them at the KC Stadium until 2016.
Both have been on loan at City and have helped Hull in their rise to second place in the Championship table.
Brady, 20, also attracted interest from Watford and was valued at £2 million. He also spent last season on loan at Hull and made a solitary appearance for United, as a substitute in September’s Capital One Cup win over Newcastle.
Meyler, 23, made 31 appearances for Sunderland before joining Hull in November and he has now completed a permanent move, for a fee of around £1.5 million.
Hull manager Steve Bruce had worked with Meyler at the Stadium of Light who is eager to return to the Premier League as soon as possible.
“I want to help this team into the Premier League and if it means dropping down a division for now, then that's what I'll do,” he said. “This side is a terrific side. They're a great bunch and they have what it takes to win promotion."
Bruce returned to another of his former clubs, United, to sign Brady, who has been played as a left wing-back in his second spell on Humberside.
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