Henry will be part of the backroom staff alongside Graeme Jones, who was Martinez's assistant at Swansea, Wigan and Everton.

"Thierry is an important figure," said former Everton boss Martinez. "He will bring something different. He agreed right away to join us."

Henry, 39, tweeted: "Honoured to be assistant coach, very excited, can't wait."

Martinez also named his first senior squad on Friday, ahead of their friendly against Spain on Thursday 1 September.

The Spaniard took over from Wilmots in August, who was sacked after Belgium were beaten 3-1 by Wales in the quarter-finals of Euro 2016.