She also worked as a marketing executive at the Women's Championship club, who said they were "devastated".

"This is heartbreaking news for everyone at Bramall Lane," said

Sheffield United chief executive officer Stephen Bettis.

"Maddy had a unique position of being part of a number of teams at Sheffield United and was popular with everyone that she came into contact with.

"Her personality and professionalism made her a credit to her family - she will be sadly missed.

"Whilst taking in the news and moving forward, the club will offer as much support as possible to Maddy's family, friends and colleagues."

Cusack's former clubs Birmingham, Aston Villa and Nottingham Forest also paid tribute.

The Football Association's director of women's football, Baroness Sue Campbell, said English football's governing body are in contact with Sheffield United and offering them support at this "incredibly sad time".

"On behalf of the FA, the Lionesses, the Women's Super League and the Women's Championship, our thoughts and deepest condolences are with Maddy's family, friends, team-mates and everyone at Sheffield United," she said.

"Maddy also represented England at age-group level and we will pay tribute to her at an appropriate point."

Former Sheffield United men's captain Billy Sharp posted an image of himself and Cusack on X, formerly Twitter, with the caption: "Such a lovely girl. Enjoyed some amazing times with Maddy and the Blades. Such a sad loss. RIP Maddy."

The cause of Cusack's death has not been announced.