50 Cent is suing his ex-girlfriend Daphne Joy for defamation after she publicly accused him of rape and physical abuse on Instagram.

The In Da Club rapper, real name Curtis Jackson, filed the lawsuit against the mother of his 11-year-old son in Texas on Monday.

In the court documents, he claimed Joy, real name Daphne Narvaez, subjected him to "extensive public ridicule, hatred and contempt" by making the allegations on Instagram in March.

According to People, Jackson's lawyers argued in the filing that Narvaez made her claims public to retaliate against the rapper's attempts to gain custody of their son, Sire.

They wrote that she made her "multiple defamatory statements" on Instagram to "falsely and publicly accuse Jackson of rape and physical abuse during their prior relationship, in a purposeful attempt to... destroy his personal and business reputation, harm Jackson's commercial and business interests, negatively affect his custody case, and prevent him from seeing his minor son."

The hip-hop star alleged that the model posted her allegations "out of sheer hatred and ill will toward Jackson".

His attorney Reena Jain told the outlet that "despite being given ample opportunity to retract a false and malicious retaliatory accusation, Ms. Narvaez has shamefully chosen to interfere with her 11-year-old son's relationship with his loving father by falsely calling him a 'rapist.'"

He is seeking more than $1 million (£802,000) in damages.

Jackson was previously charged with domestic violence over an incident involving Narvaez in 2013. He subsequently pleaded guilty to a lesser charge of misdemeanour vandalism.