Actor Shia LaBeouf is embroiled in a messy legal war with his uncle, who has allegedly reneged on a deal to pay back a $800,000 (£533,000) loan.

The Transformers star and his mother Shayna Saide filed suit against Barry Saide earlier this year (13), claiming he had failed to pay back any of the cash his movie star nephew had loaned him.

On Thursday (01Aug13), Saide hit back at the claims, filing his own suit at Manhattan Supreme Court in New York City, alleging his relatives are trying to bankrupt him, despite the fact he allegedly helped them before LaBeouf made it big.

In the affidavit, Saide writes, "Had I thought that Shayne and Shia would take this extraordinary step and seek to impoverish me, I never would have borrowed a dollar from Shia... Prior to Shia's ascendancy to film stardom... (I loaned) hundreds of thousands of dollars to assist in the support of Shayne and Shia."

In his suit, LaBeouf claims his uncle agreed to pay the cash back in 15 installments, beginning in January, 2011, and ending in April, 2012. He is seeking for the loan to be paid back in full, along with $39,999 (£26,666) in interest.