Rocker Dweezil Zappa has been sued by his divorce lawyer over an allegedly unpaid bill.

The musician's wife, Lauren Knudsen, filed for divorce in 2010 citing irreconcilable differences after five years of marriage and Zappa has been dealt a further blow after being hit with a lawsuit from his attorney James Eliaser.

The legal papers, obtained by TMZ.com, suggest Zappa owes the lawyer $37,000 in unpaid fees.

Dweezil is the son of late acclaimed rocker Frank Zappa.