The 30-year-old arrives from West Ham United in a £5m transfer, and signs a four-year contract.

Randolph was at Rockliffe Park early on Saturday morning to complete a medical and agree personal terms.

“I’m delighted to get it all signed and completed,” Randolph said.

“Arriving here and see the facilities, it’s definitely a Premier League club. I want to come here and get the club back to where it belongs and be part of something special.”

Darren Randolph arrives at Rockliffe

Bray-born Randolph made his professional debut with Charlton Athletic in 2007, before spells with Motherwell and Birmingham City.

He joined the Hammers in 2015, where he made 42 appearances, and finished the 2016/17 season as Slaven Bilic’s number one between the posts.

The goalkeeper becomes Garry Monk’s sixth signing as Boro boss, following the transfers of Jonny Howson, Cyrus Christie, Martin Braithwaite and Britt Assombalonga, as well as the arrival of Connor Roberts on loan.

Check back at mfc.co.uk tomorrow for Darren’s exclusive first interview as a Boro player.