A former guard at New York's Rikers Island jail is threatening to sue prison bosses after she was fired for allegedly spying on the facility's most famous inmate, Lil Wayne. 

Amelia Negron was dismissed from her position at the institution last month after she was accused of wandering into the unit where the star is being held, without proper authorization. 

Negron admits she did go into the unit, but denies she was there to see the rapper, insisting she wanted to speak with a colleague. 

A spokesman for the Correction Department claims Negron's dismissal was "entirely appropriate".

Lil Wayne is serving a year-long sentence on gun possession charges.